| Blocked Drain Rotherham Ltd | Mexborough | 2026 |
| Blocked Drains and Plumbing Ltd | Potters Bar | 2016 |
| Blocked Drains Limited | Wimborne | 2017 |
| Blocked UP Ltd | Watford | 2026 |
| Blockfree Services Limited | Louth | 2002 |
| Bloggs Underground Services Ltd | Southampton | 2026 |
| Bloomberg Waste Services Ltd | Henfield | 2022 |
| Bloomfield Recycling Ltd | Solihull | 2025 |
| Bloomfield Resources Ltd | Tipton | 2024 |
| Bloomsbury Waste Management Ltd | Newhaven | 2026 |
| Blow & Scrimshaw Limited | Sheffield | 1964 |
| BLP Waste Removal Services Ltd | Weybridge | 2022 |
| BLS Waste Solutions Limited | Rotherham | 2020 |
| BLU 1 Skip Hire Limited | Mitcham | 2015 |
| Blue a Ltd | Hemel Hempstead | 2013 |
| Blue Azul Limited | Newry | 2019 |
| Blue Business Water Limited | Newcastle Upon Tyne | 2014 |
| Blue Cube Partnership Limited | Southport | 2005 |
| Blue Diamond Cleaners Ltd | London | 2021 |
| Blue Environmental Limited | Skipton | 2005 |
| Blue Line Commissioning Ltd | Isleworth | 2026 |
| Blue Marble Waste Disposal Limited | Manchester | 2025 |
| Blue Phoenix UK Mobile IBA Holdings Ltd | Totnes | 2012 |
| Blue Phoenix UK Mobile IBA Ltd | Totnes | 2024 |
| Blue Planet Environmental Solutions (UK) Ltd | London | 2022 |
| Blue Sector Ltd | Stevenage | 2025 |
| Blue Signal Ltd | Dorking | 1995 |
| Blue Skip Hire Ltd | Leicester | 2025 |
| Blue Skip London Ltd | Feltham | 2012 |
| Blue Sky BIO Ltd | Wirral | 2013 |
| Blue Sky Environmental (London) Ltd | Farnborough | 2013 |
| Blue Sky Guttering Group Ltd | Middlesex | 2004 |
| Blue Sky Guttering Plus Ltd | Hayes | 2019 |
| Blue Sky Recycling Limited | Ilkeston | 2017 |
| Blue TAP Solutions Ltd | Witney | 2021 |
| Blue Tree Waste Limited | Sutton | 2020 |
| Blue Waste OIL Ltd | Leicester | 2018 |
| Blueberry Developments Estates Limited | Ramsgate | 2010 |
| Blueberry Regeneration Ltd | Ramsgate | 2019 |
| Bluebird Facilities Limited | London | 2014 |
| Bluebirds Labouring Ltd | Bury | 2024 |
| Bluebridge Recycling Ltd | London | 2026 |
| Blueearth Recycling Limited | Derbyshire | 2020 |
| Bluehills International Ltd | Wolverhampton | 2025 |
| Bluelitty Limited | London | 2025 |
| Bluerock Contracting Limited | Egham | 2025 |
| Bluerye Field Ltd. | London | 2014 |
| Bluesafe Holdings Limited | Larne | 2025 |
| Bluesky Environmental Ltd | Cambuslang | 2019 |
| Bluestar Environmental Services Limited | Hope Valley | 2002 |
| Bluestar Recycling Limited | Erith | 2023 |
| Bluewater Waste Management Ltd | Barnstaple | 2024 |
| Blufox Environmental Company Limited | London | 2026 |
| Blugilt Peterlee Limited | Nottingham | 1978 |
| Bluwater Compliance Limited | Leigh | 2018 |
| Bluwater Valves Limited | Peterborough | 2024 |
| BM Energies Ltd | Slough | 2025 |
| BM Leak Detection Ltd | Stroud | 2025 |
| BM Tech Limited | Derby | 2005 |
| BMJ Waste Limited | Harrow | 2012 |
| BML Waste Removals Ltd | Ashton-Under-Lyne | 2023 |
| BN & Lord Muck Skips Limited | Cleckheaton | 2021 |
| BN Drainage Ltd | Beckenham | 2020 |
| BN Skips Recycling Solutions Ltd | Bradford | 2026 |
| BN Waste & Recycling Ltd | Petworth | 2025 |
| Bngaway Ltd | Warrington | 2026 |
| BNS Company (Property Holdings) Limited | Hounslow | 2000 |
| BNT Logistics Ltd | Middlesbrough | 2025 |
| Boars Head Water Supply Company Limited | Harrogate | 2002 |
| BOB Skips Ltd | Dartford | 2022 |
| Bobs Upvc Limited | Stevenage | 2013 |
| Bobzap Limited | London | 2023 |
| Boddington Demolition Limited | St. Neots | 2000 |
| Boden Skips Ltd | Rowley Regis | 2015 |
| Bodnetts Commercial Limited | Lichfield | 2014 |
| Bold AS Brass Recycling Limited | Stalybridge | 2026 |
| Bold Waste Management Limited | Manchester | 2025 |
| Bolton Breakers North West Limited | Bolton | 2016 |
| Bolton Brothers Limited | Ipswich | 1999 |
| Boltons Recycling Limited | Ipswich | 2011 |
| Bomidot Ventures Limited | London | 2015 |
| BON Accord Pest Control Ltd | London | 2023 |
| Bond's Utilities Services Ltd | Bristol | 2004 |
| Bones & Jones FM Ltd | London | 2025 |
| Bonnick Works Limited | Isleworth | 2025 |
| Bonwycks London Ltd | Caterham | 2024 |
| Book a Cleaner Ltd | Leeds | 2021 |
| Book a Lorry Limited | Uxbridge | 2020 |
| Book My Skip Ltd | Barnsley | 2025 |
| Booker Water Retail Ltd | Welwyn | 2026 |
| Boomerang Recycling for Good CIC | Newcastle | 2025 |
| Boost Construction Scotland Ltd | Livingston | 2022 |
| Boost Recycling Limited | Cambridge | 2007 |
| Booth Ventures Limited | Warrington | 2004 |
| Bootland Construction Ltd | London | 2024 |
| Bordaloo Limited | Carlisle | 2025 |
| Border Plastics Recycling Limited | Leicester | 2020 |
| Border Skip Hire Ltd | Newry | 2023 |
| Border Welha Limited | Leeds | 2015 |
| Borders Fallen Stock Ltd | Clitheroe | 2022 |