Slough · SL3
Gas safety certificate in SL3 (Colnbrook)? We'll point you the right way.
Covering Colnbrook, Datchet, Fulmer, George Green, Horton, Langley, Poyle , including Colnbrook & Poyle, Datchet, Horton & Wraysbury, Farnhams & Stoke Poges. Find Gas Safe registered engineers nearby.
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Request a gas safety certificate in SL3 (Colnbrook)
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Request a gas safety certificate in SL3 (Colnbrook)
How to check a gas safety engineer is registered: see the Slough page.
SL3 (Colnbrook) in a nutshell
SL3 covers Colnbrook, Datchet, Fulmer, George Green, Horton, Langley, Poyle , in Buckinghamshire and Slough and Windsor and Maidenhead. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for SL3
Two councils in one district
SL3 is split between Buckinghamshire and Slough and Windsor and Maidenhead. Some councils run their own landlord licensing, so check which one your home is in.
Where's this from?
postcodes.io (ONSPD) local authorityGive your full postcode
SL3 stretches across Colnbrook & Poyle, Datchet, Horton & Wraysbury, Farnhams & Stoke Poges and more, so give your full postcode, not just 'SL3', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Slough run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Slough: 73.4% mains gas onlyEngland landlord rules: quick version
- Every year: a check by a Gas Safe registered engineer.
- Within 28 days: give your tenants a copy (new tenants get it before they move in).
- Keep it: hang on to records for at least 2 years.
More detail on the Slough page. Always double-check on GOV.UK.
Next door to SL3
Frequently asked questions
Which areas does SL3 cover?
SL3 (Colnbrook, Datchet, Fulmer, George Green, Horton, Langley, Poyle ) includes the wards of Colnbrook & Poyle, Datchet, Horton & Wraysbury, Farnhams & Stoke Poges, Iver, Langley Foxborough, Langley Marish, Langley Meads, Langley St Mary's, Slough Central, Upton, Wexham Court (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to SL3?
Neighbouring districts include SL0 (Iver), SL1 (Burnham), SL2 (Farnham Common), TW20 (Egham) (ONS Postcode Directory via Doogal). A pro covering SL3 may well cover these too, so it's worth asking.
How many homes are in SL3?
About 17,312 households and 45,192 residents at the 2011 Census, across 1,077 active postcodes (Doogal / ONS Postcode Directory).
Which council area is SL3 in?
SL3 sits in Buckinghamshire, Slough, Windsor and Maidenhead (postcodes.io). Parliamentary constituency: Beaconsfield, Slough, Windsor.
📊 The numbers behind this page
- Postcode district
- SL3 1
- Areas covered
- Colnbrook, Datchet, Fulmer, George Green, Horton, Langley, Poyle 2
- Active postcodes
- 1,077 3
- Households (2011 Census, via Doogal)
- 17,312 2
- Population (2011 Census, via Doogal)
- 45,192 2
- Electoral wards
- Colnbrook & Poyle, Datchet, Horton & Wraysbury, Farnhams & Stoke Poges, Iver, Langley Foxborough, Langley Marish, Langley Meads, Langley St Mary's … 4
- Parliamentary constituencies
- Beaconsfield, Slough, Windsor 4
- Local authority
- Buckinghamshire, Slough, Windsor and Maidenhead 4
- Households heated by mains gas only (Slough built-up area)
- 73.4% 5
- ONS Postcode Directory
- Doogal
- Doogal / ONSPD
- postcodes.io
- ONS Census 2021
Made with open data. See where it all comes from. Updated 26 October 2026.