| Tower Waste Ltd | London | 2022 |
| Town & Country Clearance Ltd | London | 2025 |
| Town & Country Drainage Limited | Croydon | 2014 |
| Towy Metals Ltd | Llandeilo | 2017 |
| Towzilla Transport Ltd | South Croydon | 2025 |
| Toxic Disposal Limited | London | 2025 |
| TP 1 Limited | Kings Lynn | 2009 |
| TP 9 Limited | Kings Lynn | 2013 |
| TP Clearances Limited | Thatcham | 2022 |
| TP Disposals Ltd | Dorchester | 2021 |
| Tprice&Sons Ltd | Walsall | 2023 |
| TPS Environmental Ltd | Newport | 2025 |
| Tptf Ltd | Pontypool | 2025 |
| Tracked Waste Limited | Glasgow | 2023 |
| Tracouk Ltd | Portsmouth | 2013 |
| Tractom Distribution Limited | Glasgow | 2015 |
| Tracy James Transport Limited | Stanford-Le-Hope | 2022 |
| Trade and Transport Services Ltd | Macclesfield | 2016 |
| Trade Balers Limited | Belfast | 2011 |
| Trade Carpets (Southern) Limited | East Sussex | 1997 |
| Trade Compliance Ltd | Arlesey | 2014 |
| Trade County Limited | Sutton | 2023 |
| Trade Effluent Services Limited | Wrexham | 1991 |
| Trade Export-Import Ltd | Wakefield | 2022 |
| Trade Post Clearance Ltd | Leigh | 2024 |
| Trade Waste Limited | Nottingham | 1998 |
| Trade Waste Management Services UK Limited | Bristol | 2025 |
| Trade Waste OIL Solutions Ltd | Leeds | 2026 |
| Trade Waste Solutions Ltd | Hessle | 2017 |
| Trade Waste Solutions Sussex Ltd | Brighton | 2023 |
| Tradebe Dinnington Limited | Marlow | 1991 |
| Tradebe Fawley Limited | Marlow | 1993 |
| Tradebe Gwent Limited | Marlow | 1920 |
| Tradebe Healthcare (Holdings) Limited | Marlow | 2013 |
| Tradebe Healthcare Limited | Marlow | 1997 |
| Tradebe Healthcare National Limited | Marlow | 1999 |
| Tradebe Heysham Limited | Marlow | 2019 |
| Tradebe Management Limited | Marlow | 2002 |
| Tradebe North West Limited | Marlow | 2002 |
| Tradebe Refinery Services Limited | Marlow | 1989 |
| Tradebe Solvent Recycling Limited | Marlow | 1999 |
| Tradeiton Ltd | Stoke-On-Trent | 2021 |
| Trademet Ltd | Sheffield | 2014 |
| TRADES2YOU Ltd | London | 2020 |
| Trading Green Limited | Wadebridge | 2000 |
| Trading Products Limited | Berwick-Upon-Tweed | 2016 |
| Trafford Environmental Services Limited | Glossop | 2003 |
| Trak Environmental Services Limited | Manchester | 2025 |
| Tramspread Slurry Storage Limited | Stowmarket | 2006 |
| Trans Metal Ltd | Basildon | 2020 |
| Trans Tech Metal Scrap Ltd | Hatfield | 2019 |
| Trans-Euro Express Limited | Cranleigh | 2003 |
| Trans-Waste (SW) Limited | Launceston | 2005 |
| Trans-Waste Group Ltd | Cardiff | 2019 |
| Transact Energy UK Limited | Sawbridgeworth | 2010 |
| Transco Waste Limited | Newry | 2002 |
| Transform Cleaning Limited | Reading | 2014 |
| Transforming Local Communities C.I.C. | Norwich | 2019 |
| Transglobe Haulage Ltd | Hounslow | 2025 |
| Transport Flow Limited | Huddersfield | 2019 |
| Transportise Ltd | Waterlooville | 2022 |
| Transwaste Limited | Ammanford | 1995 |
| Transwaste NW Limited | Melton | 2026 |
| Transwaste Recycling and Aggregates Limited | Melton | 1999 |
| Transwaste Services Limited | Melton | 1999 |
| Trash & Grabz Ltd | Hook | 2026 |
| Trash 2 Go Limited | Ware | 2021 |
| Trash 2 Trees Ltd | Torquay | 2025 |
| Trash Brothers Ltd | Glasgow | 2022 |
| Trash Busters Limited | Glasgow | 2025 |
| Trash Converters Inc Limited | Cardiff | 2019 |
| Trash Smart Solutions Ltd | London | 2023 |
| Trash Taxis Ltd | Sunderland | 2018 |
| Trash Titans Ltd | Liverpool | 2026 |
| Trash Troopers Junk Removal&Clean UP Ltd | Burntwood | 2026 |
| Trash UK Limited | Evesham | 1999 |
| Trash-T Ltd | Flitwick | 2023 |
| TRASH4TREASURE UK Limited | Warwick | 2025 |
| Trashformers Limited | Blackburn | 2025 |
| TRD Motors Ltd | Wolverhampton | 2026 |
| Treasure Trash & Tees Ltd | Waterlooville | 2024 |
| Treasured Transport Limited | Harlow | 2021 |
| Treatment Wetlands Ltd | Holyhead | 2019 |
| Treaty Drains Ltd | Waltham Abbey | 2021 |
| Tredunnock Services Ltd | Hereford | 2015 |
| Trees and Rivers Limited | Castlereagh | 2005 |
| Trefnanney Water Consumers Association Limited | Meifod | 1964 |
| Trefoil Technology Limited | Chelmsford | 2009 |
| Trenchline Utilities Limited | Bexhill | 2008 |
| Trent Industries Ltd | Cardiff | 2018 |
| Trev's Waste Clearance Limited | Bristol | 2023 |
| Trevix Limited | London | 2025 |
| Trevor Potts Plant Hire Ltd | Rotherham | 2012 |
| Trident Commercial Holdings Limited | Deeside | 1978 |
| Trident Solutions Limited | Liverpool | 2004 |
| Trident Utilities and Civils Ltd. | Gillingham | 2019 |
| Trident Waste Management Ltd | Ashford | 2012 |
| Trident Water Solutions Limited | Royal Wootton Bassett | 2002 |
| Trifan Ltd | Stoke-On-Trent | 2017 |
| Trikon Solutions Ltd | Cardiff | 2013 |