Delf Street Sheffield
57 addresses across 2 postcodes (S2), about 160 m long, classed as a local road. USRN 34401413.
- Sales: 126 recorded sales since 1995; in 2026 the median was £189,000 across 1 sale.
- Energy: 47 homes have an energy certificate (C: 3, D: 33, E: 9, F: 2).
- Flood: 1 address on its postcodes is in areas at high or medium risk of flooding from rivers, the sea or surface water.
- Council tax: Most homes around it are in council tax band A; Band D in Sheffield costs £2,510 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Sheffield, about 1.6 km (1 mile) away in a straight line.
- Green space: The nearest park or garden, Heeley Millennium Park, is about 360 m away.
- Air: Background air pollution in 2024 was 13.2 µg/m³ of nitrogen dioxide and 7.7 of PM2.5, within UK legal limits.
- Height: Its addresses are 78 to 83 m above sea level.
- Noise: 5 of its 57 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is The Mathews Practice Belgrave, about 540 m (0.3 miles) away, with 9 practices within 1.6 km (1 mile).
- People: About 540 people lived in the census areas around it in 2021; 68% of households owned their home and 52% of adults held a degree or other higher qualification.
- Crime: 78 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2026 | 1 | £189,000 | £189,000 | £189,000 |
| 2024 | 3 | £200,000 | £185,500 | £220,000 |
| 2023 | 2 | £231,500 | £231,500 | £231,500 |
| 2022 | 5 | £215,000 | £190,000 | £226,000 |
| 2021 | 3 | £198,000 | £170,000 | £212,000 |
| 2020 | 5 | £192,000 | £100,000 | £194,000 |
| 2018 | 4 | £166,500 | £155,000 | £175,000 |
| 2017 | 8 | £153,650 | £115,000 | £163,500 |
| 2016 | 5 | £130,000 | £105,000 | £139,950 |
| 2015 | 6 | £130,250 | £119,500 | £139,950 |
| 2014 | 7 | £124,950 | £112,500 | £135,000 |
| 2012 | 1 | £118,500 | £118,500 | £118,500 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 10 Jun 2026 | 32 S2 3GX | Terraced | £189,000 | |
| 10 Dec 2024 | 23 S2 3GX | Terraced | £220,000 | |
| 1 Nov 2024 | 49 S2 3GX | Terraced | £185,500 | Leasehold. |
| 6 Sep 2024 | 45 S2 3GX | Terraced | £200,000 | |
| 19 Dec 2023 | 19 S2 3GX | Terraced | £231,500 | Leasehold. |
| 19 Dec 2023 | 19 S2 3GX | Terraced | £231,500 | |
| 19 Nov 2022 | 27 S2 3GX | Terraced | £215,000 | Leasehold. |
| 25 Aug 2022 | 21 S2 3GX | Terraced | £218,333 | Leasehold. |
| 15 Jul 2022 | 22 S2 3GX | Terraced | £226,000 | |
| 4 Apr 2022 | 3A S2 3GX | Terraced | £190,000 | |
| 15 Feb 2022 | 26 S2 3GX | Terraced | £205,000 | |
| 2 Nov 2021 | 24 S2 3GX | Terraced | £198,000 | |
| 26 Oct 2021 | 29 S2 3GX | Terraced | £212,000 | Leasehold. |
| 1 Oct 2021 | 47 S2 3GX | Terraced | £170,000 | Leasehold. |
| 11 Dec 2020 | 41 S2 3GX | Semi-detached | £192,000 | Leasehold. |
| 11 Dec 2020 | 41 S2 3GX | Semi-detached | £192,000 | |
| 16 Sep 2020 | 42 S2 3GX | Terraced | £190,000 | |
| 8 Jun 2020 | 31 S2 3GX | Terraced | £100,000 | Leasehold. |
| 22 May 2020 | 17 S2 3GX | Terraced | £194,000 | Leasehold. |
| 20 Dec 2018 | 40 S2 3GX | Terraced | £165,000 | |
| 2 Nov 2018 | 44 S2 3GX | Terraced | £168,000 | Leasehold. |
| 14 Sep 2018 | 33 S2 3GX | Terraced | £175,000 | Leasehold. |
| 6 Aug 2018 | 27 S2 3GX | Terraced | £155,000 | Leasehold. |
| 30 Nov 2017 | 15 S2 3GX | Terraced | £158,000 | Leasehold. |
| 30 Nov 2017 | 15 S2 3GX | Terraced | £158,000 | |
| 15 Sep 2017 | 51 S2 3GX | Terraced | £135,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 14 Aug 2017 | 36 S2 3GX | Terraced | £120,000 | Leasehold. |
| 10 Jul 2017 | 17 S2 3GX | Terraced | £163,500 | Leasehold. |
| 3 Jul 2017 | 7 S2 3GX | Terraced | £155,000 | Leasehold. |
| 30 Jun 2017 | 49 S2 3GX | Terraced | £150,000 | Leasehold. |
| 8 May 2017 | 50 S2 3GX | Terraced | £152,300 | Leasehold. |
| 17 Feb 2017 | 1 S2 3GX | Terraced | £115,000 | Leasehold. |
| 2 Sep 2016 | 9 S2 3GX | Terraced | £139,950 | Leasehold. |
| 24 Jun 2016 | 13 S2 3GX | Terraced | £105,000 | |
| 26 May 2016 | 19 S2 3GX | Terraced | £133,100 | Leasehold. |
| 29 Jan 2016 | 50 S2 3GX | Terraced | £122,000 | Leasehold. |
| 15 Jan 2016 | 27 S2 3GX | Terraced | £130,000 | Leasehold. |
| 30 Oct 2015 | 44 S2 3GX | Terraced | £121,500 | Leasehold. |
| 12 Aug 2015 | 29 S2 3GX | Terraced | £124,000 | Leasehold. |
| 31 Jul 2015 | 21 S2 3GX | Terraced | £136,500 | Leasehold. |
| 2 Jul 2015 | 14 S2 3GX | Terraced | £138,950 | Leasehold. |
| 5 Jun 2015 | 3A S2 3GX | Terraced | £119,500 | |
| 8 May 2015 | 7 S2 3GX | Terraced | £139,950 | Leasehold. |
| 5 Dec 2014 | 28 S2 3GX | Terraced | £124,950 | Leasehold. |
| 21 Nov 2014 | 8 S2 3GX | Terraced | £130,000 | |
| 10 Oct 2014 | 31 S2 3GX | Terraced | £122,950 | Leasehold. |
| 26 Aug 2014 | 46 S2 3GX | Terraced | £135,000 | Leasehold. |
| 6 Aug 2014 | 22 S2 3GX | Terraced | £124,950 | |
| 16 Apr 2014 | 54 S2 3GX | Terraced | £112,500 | |
| 3 Feb 2014 | 23 S2 3GX | Terraced | £121,000 | Leasehold. |
Energy performance certificates
47 homes with a current certificate; median floor area 85 m². Most common: House, mid-terrace (42); House, end-terrace (5). Built: 1900-1929 (42); 1930-1949 (4); before 1900 (1). Tenure at assessment: owner-occupied (34); rented (private) (9).
Each home's certificates and sales (32 addresses)
- 1, Delf Street
- 1a, Delf Street
- 3, Delf Street
- 3a, Delf Street
- 5, Delf Street
- 7, Delf Street
- 8, Delf Street
- 9, Delf Street
- 10, Delf Street
- 12, Delf Street
- 13, Delf Street
- 15, Delf Street
- 17, Delf Street
- 22, Delf Street
- 24, Delf Street
- 26, Delf Street
- 28, Delf Street
- 29, Delf Street
- 31, Delf Street
- 33, Delf Street
- 35, Delf Street
- 36, Delf Street
- 38, Delf Street
- 40, Delf Street
- 41, Delf Street
- 42, Delf Street
- 43, Delf Street
- 44, Delf Street
- 46, Delf Street
- 50, Delf Street
- 51, Delf Street
- 54, Delf Street
Council tax
What each band costs in Sheffield in 2026-27: Band D £2,510 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,673 | £1,952 | £2,231 | £2,510 | £3,068 | £3,626 | £4,184 | £5,020 |
Homes by band in the neighbourhood around this street: most are in band A (74% of about 690 homes).
Planning and heritage
- Conservation area: no postcode centre in this street's postcodes is in one.
- Listed buildings on or by this street: none.
- Article 4 direction (removing permitted development rights): none recorded, though not every council has published theirs.
- Tree preservation orders: none recorded, though not every council has published theirs.
- Green belt: no.
Brownfield land registered for housing within 1 km (0.6 miles)
- Former Heeley Bank Junior School Heeley Bank Road Sheffield S2 3GL, permissioned (320 m)
- S R Gents factory, Norfolk Park, not permissioned (320 m)
- Earl Of Arundel And Surrey Hotel 528 Queens Road, not permissioned (390 m)
- 250 Lancing Road Sheffield S2 4EX, permissioned (440 m (0.3 miles))
- Ball Inn Myrtle Road Sheffield S2 3HR, not permissioned (500 m (0.3 miles))
- Waggon And Horses 236 Gleadless Road Sheffield S2 3AF, permissioned (540 m (0.3 miles))
- Site Of Former Heeley National School Gleadless Road Sheffield S2 3AL, not permissioned (560 m (0.3 miles))
- Royal Riverside, 60 Priestley Street, Sheffield S2 4FS, permissioned (650 m (0.4 miles))
Roadworks
No street works under way, planned or finished in the last three months on this street, in permits up to 31 October 2026.
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 1 address is in areas at high risk, 0 at medium risk and 5 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.
Rivers and the sea alone: no home is in an area at risk.
High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. Very low: under 0.1%. The rivers and sea figures allow for flood defences. Counts cover whole postcodes, which can include other streets.
Flood zone for planning: no postcode centre on this street is in flood zone 2 or 3.
| Postcode | Planning zone | Addresses at high / medium / low risk | Groundwater |
|---|---|---|---|
| S2 3GX | not in 2 or 3 | 1 / 0 / 1 | unlikely |
| S2 3GY | not in 2 or 3 | 0 / 0 / 4 | unlikely |
Height above sea level
The street's 57 addresses are between 78 m and 83 m above sea level (80 m on average); the ground rises about 6 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| S2 3GX | 100% | 100% | 100% | 0% |
| S2 3GY | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Sheffield 10 million journeys in 2024–25 | 1.6 km (1 mile) |
| Darnall 22,000 journeys in 2024–25 | 4.1 km (2.6 miles) | |
| Dore and Totley 240,000 journeys in 2024–25 | 5.3 km (3.3 miles) | |
| Underground, metro or tram | Park Grange | 710 m (0.4 miles) |
| Park Grange Croft | 770 m (0.5 miles) | |
| Arbourthorne Road | 1.1 km (0.7 miles) | |
| Bus stops | 12 stops within 400 m (0.2 miles), 53 within 800 m (0.5 miles); nearest Heeley Bank Road/Spurr Street Lowfield | 130 m |
| Bus or coach station | Sheffield Interchange/C6 Sheffield Centre | 1.7 km (1.1 miles) |
| Car parks | 1 within 800 m (0.5 miles); nearest Parking space on Norfolk Park Road, S2 | 750 m (0.5 miles) |
| EV charging points | 2 within 1.6 km (1 mile); nearest Shell Recharge Charging Station | 1.3 km (0.8 miles) |
| Airport with scheduled flights | Manchester Airport MAN | 54.3 km (34 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 9 practices within 1.6 km (1 mile); nearest The Mathews Practice Belgrave | 540 m (0.3 miles) |
| Pharmacies | 12 pharmacies within 1.6 km (1 mile); nearest Allied Pharmacy Gleadless Rd | 560 m (0.3 miles) |
| NHS dentists | 6 practices within 1.6 km (1 mile); nearest Park Hill Dental Surgery | 300 m |
| Hospital | Royal Hallamshire Hospital | 2.5 km (1.5 miles) |
| Police station | Snig Hill Police Station | 2.3 km (1.4 miles) |
| Cash machines | 4 machines within 800 m (0.5 miles); nearest AM Premier Cashzone | 320 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 7 within 800 m (0.5 miles); nearest Heeley Millennium Park 1.9 ha | 360 m |
| Largest park within 800 m (0.5 miles) | Unnamed 14 ha | 380 m |
| Play area | 6 within 800 m (0.5 miles); nearest Unnamed 3,210 m² | 500 m (0.3 miles) |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 3.0 ha | 130 m |
| Allotments | 1 within 800 m (0.5 miles); nearest Heeley Allotment Gardens 8,600 m² | 600 m (0.4 miles) |
Within 800 m (0.5 miles): 7 parks and gardens, 22 hectares in all.
Landmarks
The nearest historic landmark is Hoffman Kiln between Aizlewood Road and Cutts Terrace, a scheduled monument, 890 m (0.6 miles) south-west. 46 listed buildings are within 1 km (0.6 miles), 3 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| Hoffman Kiln between Aizlewood Road and Cutts Terrace | Scheduled monument | 890 m (0.6 miles) south-west |
| Portland Works | Listed building, Grade II* | 890 m (0.6 miles) north-west |
| Mount Pleasant Community Centre | Listed building, Grade II* | 890 m (0.6 miles) west |
| Former Stables and Coach House at Number 3 Mount Pleasant Community Centre | Listed building, Grade II* | 930 m (0.6 miles) west |
| Norfolk Heritage Park | Registered park or garden, Grade II* | 1.1 km (0.7 miles) north-east |
| Monument Grounds, Sheffield | Registered park or garden, Grade II | 1.4 km (0.9 miles) north |
| Name | What it is | From the middle of the street |
|---|---|---|
| Brownell's Plantation | Wood | 870 m (0.5 miles) south-east |
| Clay Wood | Wood | 1.3 km (0.8 miles) north |
| High Bank Wood | Wood | 1.4 km (0.9 miles) south-east |
| Sharrow Vale | Valley | 1.8 km (1.1 miles) west |
| Mill Stream | Lake or reservoir | 1.9 km (1.2 miles) west |
| Acres Hill | Hill | 3.6 km (2.2 miles) north-east |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 13.2 | 40 | 10 |
| Fine particles (PM2.5) | 7.7 | 20 | 5 |
| Particles (PM10) | 11.7 | 40 | 15 |
All three are within the UK legal limits; nitrogen dioxide and PM2.5 are above the WHO guideline, as in most towns and cities.
Road and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 55 to 59 | 5 | 0 |
| Under 55 | 52 | 57 |
5 of the street's 57 addresses are modelled at 55 dB or more from road traffic, above the WHO guidelines.
Climate, daylight and earthquakes
Monthly temperatures and rainfall, sunrise and sunset through the year, and earthquakes recorded nearby since 1970 are much the same across the area, so they are worked out once for Sheffield: see them on the Sheffield page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Anns Grove Primary School | Primary | 3–11 | 460 m (0.3 miles) | No published inspection |
| Lowfield Community Primary School | Primary | 5–11 | 500 m (0.3 miles) | No published inspection |
| Sharrow Nursery, Infant and Junior School | Primary | 2–11 | 830 m (0.5 miles) | No published inspection |
| The Sheffield College | 16 plus | 16–99 | 1.1 km (0.7 miles) | No published inspection |
| All Saints' Catholic High School Roman Catholic | Secondary | 11–18 | 1.1 km (0.7 miles) | Report card (Apr 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Post-16 provision: Expected standard; Safeguarding standards: Met |
| Carfield Primary School | Primary | 3–11 | 1.1 km (0.7 miles) | Report card (Jan 2026): Curriculum and teaching: Strong standard; Achievement: Strong standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Strong standard; Inclusion: Strong standard; Leadership and governance: Strong standard; Early years: Strong standard; Safeguarding standards: Met |
| Arbourthorne Community Primary School | Primary | 3–11 | 1.2 km (0.8 miles) | Good (Oct 2022, overall grade under the previous framework) |
| UTC Sheffield City Centre | Secondary | 13–19 | 1.2 km (0.8 miles) | No overall grade (Apr 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Norfolk Community Primary School | Primary | 2–11 | 1.2 km (0.8 miles) | Good (Jun 2022, overall grade under the previous framework) |
| Nether Edge Primary School | Primary | 3–11 | 1.4 km (0.9 miles) | No overall grade (Mar 2025, graded inspection without an overall judgement): Quality of education: Outstanding; Behaviour and attitudes: Outstanding; Personal development: Outstanding; Leadership and management: Outstanding |
| Meersbrook Bank Primary School | Primary | 3–11 | 1.5 km (0.9 miles) | Report card (Jul 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Strong standard; Personal development and wellbeing: Expected standard; Inclusion: Strong standard; Leadership and governance: Expected standard; Early years: Strong standard; Safeguarding standards: Met |
| Bankwood Primary School | Primary | 2–11 | 1.6 km (1 mile) | Report card (Jun 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Advanced Technology Centre S2 3GE | School/college/university | 110 m | 5 Very good | 25 Jun 2025 |
| Heeley Bank Nursing Home S2 3GL | Hospitals/Childcare/Caring Premises | 170 m | 5 Very good | 8 Oct 2024 |
| Just for Kidz Ltd Heeley S2 3GL | Hospitals/Childcare/Caring Premises | 170 m | 5 Very good | 16 Sep 2025 |
| Sheffield Roller Hockey Academy S2 3GL | Other catering premises | 170 m | 4 Good | 29 Oct 2025 |
| Olive Grove Sports Club S2 3GL | Pub/bar/nightclub | 170 m | 5 Very good | 13 Aug 2025 |
| Heeley Youth Club S2 3DJ | Hospitals/Childcare/Caring Premises | 190 m | Awaiting inspection | |
| Heeley City Farm S2 3DT | Restaurant/Cafe/Canteen | 280 m | 5 Very good | 19 Jan 2026 |
| Cup & Crumb Cafe S2 3PF | Restaurant/Cafe/Canteen | 290 m | 5 Very good | 14 Oct 2025 |
| Collibre S2 4DR | Distributors/Transporters | 300 m | 5 Very good | 29 Jun 2026 |
| Premier Pricewise Convenience Store S2 3PQ | Retailers - other | 320 m | 5 Very good | 14 May 2019 |
| Yummy Stuff S2 4DR | Mobile caterer | 340 m | 5 Very good | 5 Jun 2025 |
| Asda Stores Ltd S2 4DR | Retailers - supermarkets/hypermarkets | 340 m | 5 Very good | 8 Jan 2026 |
| St Wilfrid's Centre S2 4DT | Restaurant/Cafe/Canteen | 390 m | 5 Very good | 2 Jul 2025 |
| Salvation Army Trading Co, Sheffield Donation Centre S2 4DR | Distributors/Transporters | 410 m (0.3 miles) | 4 Good | 4 Mar 2024 |
| Anns Grove Primary School (NIJ) S2 3DJ | School/college/university | 410 m (0.3 miles) | 5 Very good | 19 Jan 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 25 |
| Vehicle crime | 10 |
| Anti-social behaviour | 10 |
| Public order | 10 |
| Burglary | 8 |
| Criminal damage and arson | 4 |
| Drugs | 4 |
| Other theft | 4 |
| Other crime | 3 |
Most of these are attached to: On or near Madehurst View (17); On or near Madehurst Gardens (16); On or near Moffatt Road (11); On or near Midhill Crescent (8); On or near Slate Street (7).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 34 | 40 |
| Children under 15 | 14% | 17% |
| Aged 65 and over | 9% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 68% | 61% |
| Owned outright | 27% | 33% |
| Shared ownership | under 1% | 1% |
| Social rented | 4% | 17% |
| Private rented | 27% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 73% | 57% |
| Unemployment (of those working or looking for work) | 5% | 6% |
| Retired (of adults) | 10% | 22% |
| Long-term sick or disabled (of adults) | 3% | 4% |
| Work mainly from home (of those in work) | 44% | 32% |
| Travel to work by car or van | 37% | 48% |
| By train, Underground, metro or tram | 2% | 4% |
| By any public transport, including bus | 7% | 8% |
| On foot or by bicycle | 13% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 81% | 65% |
| Work 30 km (19 miles) or more away | 4% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 52% | 34% |
| No qualifications | 11% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 91% | 91% |
| Cannot speak English well or at all | 3% | 2% |
Deprivation
The neighbourhood around this street is in decile 5 of 10 on the English Indices of Deprivation 2025, where 1 is the most deprived tenth of England's 33,755 neighbourhoods and 10 the least.
What has changed
Nothing new since the change feed started on 30 October 2026. New sales and energy certificates, and hygiene ratings, school inspections and flood figures nearby, will be listed here as the sources update.
Postcodes on this street
Nearby streets
Anns Road North · Slate Street · Olive Grove Road · Midhill Crescent · Spurr Street · East Road · Myrtle Road · Madehurst Road · Moffatt Road · Midhill Road · Heeley Bank Road · Madehurst View
What this page cannot tell you
- Whether a particular house is at risk of flooding, subsiding or anything else: the flood map is a model of areas and there is no property-level data here.
- What a home is worth now: sales are historic prices for the homes that happened to sell.
- How safe the street is: crime points are moved to anonymised locations and many crimes are never reported.
- Whether you would get a place at a school: distances are straight lines, not catchments.
- Who lives on the street now: census figures describe the small areas around it in March 2021, during a lockdown.
- How long a journey takes or how often anything runs: transport distances are straight lines to the nearest stops.
- Whether a GP practice is taking new patients, or a dentist new NHS patients.
- How loud a home is inside, or noise from industry, neighbours or smaller airfields: noise figures are models of road, rail and air traffic outside.
How each figure on this page is matched to the street and worked out: methodology.