| A Dimond Flooring Limited | Hertfordshire | 2007 |
| A Dino Contractors Ltd | Bushey | 2018 |
| A Dinsdale Building Ltd | Leyburn | 2019 |
| A Dinwoodie Decorating Limited | Carlisle | 2008 |
| A Dishliev Ltd | Surbiton | 2018 |
| A Divers Contracts Ltd | Glasgow | 2008 |
| A Dixon Fencing Contractors Limited | Newport | 2014 |
| A DO Z Essex Limited | Brentwood | 2018 |
| A Dodd Electrical Ltd | Cannock | 2021 |
| A Donaghey Builders Limited | Bushey | 2018 |
| A Donnelly Flooring Limited | Co Tyrone | 2003 |
| A Douglas Plumbing & Heating Ltd | Whitstable | 2025 |
| A Dowds Electrical Limited | Bury St. Edmunds | 2013 |
| A Down Construction Limited | Basildon | 2017 |
| A Drake Electrical Ltd | Southend-On-Sea | 2016 |
| A Dream House Construction Ltd | Hayes | 2019 |
| A Drinkwater Property Services Limited | Oxfordshire | 2004 |
| A Duggan Build & Development Limited | Northampton | 2019 |
| A Duguid Electrical Ltd | Ellon | 2026 |
| A Duncan Limited | Saffron Walden | 2002 |
| A Duncan Plumbing and Heating Ltd | Lutterworth | 2024 |
| A Dunn Electrical Limited | Walsall | 2014 |
| A Dunne Electrical Services Ltd | Wolverhampton | 2014 |
| A Dyson Plastering Limited | Rotherham | 2018 |
| A E Access Ltd | Inverness | 2020 |
| A E Builders NW Ltd | Merseyside, Liverpool | 2024 |
| A E C Developments Ltd | Cheddar | 2004 |
| A E Cox-Peel Limited | Erdington | 2016 |
| A E Facades Ltd | Watford | 2020 |
| A E Farrell Ltd | Liverpool | 2010 |
| A E Faulks Limited | Melton Mowbray | 1993 |
| A E Hawkins Management Limited | Kidderminster | 2019 |
| A E Haywood & Sons Limited | Holmfirth | 1999 |
| A E Heating (Glos) Ltd | Gloucester | 2024 |
| A E Hedges Ltd | Lincoln | 2017 |
| A E I (North West) Limited | Blackpool | 2003 |
| A E Joiners Limited | Halifax | 2007 |
| A E Joinery Group Limited | Leeds | 2018 |
| A E Jointing Contractor Ltd | Cannock | 2024 |
| A E Larder & Co Limited | Sheffield | 2005 |
| A E M Demolition Limited | Leigh-On-Sea | 2006 |
| A E M Electrical Limited | Fareham | 2018 |
| A E Paylor Limited | Kendal | 2015 |
| A E Plumbing & Heating Limited | Tonbridge | 2014 |
| A E Plumbing & Heating Solutions Limited | Gateshead | 2022 |
| A E Property Maintenance Limited | Waltham Abbey | 2016 |
| A E Railway Solutions Ltd | London | 2014 |
| A E Renewables Ltd | Waterlooville | 2017 |
| A E Rothwell Property Developments Ltd | Nottingham | 2026 |
| A E S Construction Ltd | Southall | 2019 |
| A E Sparrow & SON Ltd | Halstead | 2020 |
| A E Tiling Limited | Bognor Regis | 2016 |
| A E White Surfacing Limited | Ipswich | 1999 |
| A E Yates Directional Drilling Ltd | Lostock, Bolton | 1995 |
| A E Yates Limited | Lostock Bolton | 1946 |
| A E Yates Trenchless Plant Limited | Bolton | 2009 |
| A E Yates Trenchless Solutions Limited | Lostock | 1995 |
| A Eames Electrical Ltd | Chelmsford | 2020 |
| A Easton Consulting Ltd | London | 2024 |
| A Easy Company Ltd | St Osyth | 2025 |
| A Edwards Roofing Limited | Newport | 2019 |
| A Electric Ltd | Manchester | 2024 |
| A Electric Solutions Limited | London | 2020 |
| A Electrical Projects Ltd | Dewsbury | 2020 |
| A Elfleet Limited | Norwich | 2022 |
| A Elliott Electrical Services Limited | Saffron Walden | 2019 |
| A Ellis Electrical Contractors Limited | Eastbourne | 2003 |
| A Elsworth Ltd | London | 2011 |
| A Energy Solutions Ltd | London | 2011 |
| A Engineering Limited | Ellesmere Port | 2010 |
| A English Ceilings Ltd | Billericay | 2024 |
| A Enright Interiors Limited | Sidcup | 2008 |
| A Esgate Property Limited | Leeds | 2018 |
| A Evans Electrical Ltd | Leven | 2025 |
| A Evans Electrical Services Ltd | Birmingham | 2025 |
| A Everall Plumbing and Heating Ltd | Tenbury Wells | 2022 |
| A Everitt Plumbing & Heating Limited | Colchester | 2019 |
| A Exell Plumbing & Heating Limited | Witney | 2003 |
| A F Beckett Limited | Grimsby | 2002 |
| A F Building & Landscaping Ltd | Castle Cary | 2008 |
| A F Building Services Limited | London | 2005 |
| A F Burdon Limited | Sunderland | 2024 |
| A F C Plumbing & Heating Limited | Grantham | 2014 |
| A F Ciocea Ltd | Bournemouth | 2022 |
| A F Civils and Groundworks Ltd | Nottingham | 2025 |
| A F Design & Build Limited | Barnsley | 2017 |
| A F Development and Construction Ltd | Hinckley | 2021 |
| A F Electrical (Scotland) Limited | Elgin | 2018 |
| A F Electrical and Sons Ltd | Southampton | 2021 |
| A F Electrical Services Limited | Lutterworth | 2007 |
| A F Installations Limited | Stockport | 2002 |
| A F Interiors Ltd | Bromsgrove | 2026 |
| A F L Scaffolding Limited | Ashford | 2014 |
| A F M Electrical Limited | Turriff | 2025 |
| A F M Piping Systems Limited | Grimsby | 2014 |
| A F Morgan Ltd | Bournemouth | 2020 |
| A F P Consulting Engineers Limited | Cambridge | 1999 |
| A F P H (Midlands) Limited | Bingham | 2014 |
| A F Poole Builders Limited | Bury St. Edmunds | 2022 |
| A F Properties (Sussex) Limited | Hailsham | 2006 |