| Prime Time Recovery Limited | London | 2026 |
| Prime Waste Management Ltd | London | 2025 |
| Prime Waste Services Ltd | Surbiton | 2023 |
| Prime Waste Solutions NE Ltd | Cramlington | 2025 |
| Prime Water Solutions Ltd | Thatcham | 2024 |
| Primefix Solutions Ltd | Enfield | 2026 |
| Primetime Services 365 Ltd | Wigan | 2021 |
| Primewaste Solutions Ltd | Bromley | 2025 |
| Prince General Services Ltd | Fareham | 2022 |
| Prince Recycling Limited | Dunmow | 1989 |
| Princes Gate 1-4 Residents Association Limited | Pembrokeshire | 2002 |
| Principal Drainage Services Limited | Dewsbury | 2003 |
| Principality Recycling Ltd | Cowbridge | 2025 |
| Principality Skips Ltd | Cowbridge | 2025 |
| Pringle Reclaim Ltd | Winchester | 2020 |
| Print Feed Limited | Sandhurst | 2020 |
| Priority Drainage Ltd | Bromley | 2025 |
| Priority HAZ Limited | Whitefield | 2015 |
| Priority Scaffolding (Cambridge) Ltd | Cambridge, | 2014 |
| Priority Waste Disposal Ltd | Norwich | 2025 |
| Priority Waste Limited | Bedford | 2007 |
| Priority Weee Limited | Bedford | 2019 |
| Prismm Limited | Telford | 2000 |
| Pristine Cleaning and Maintenance Ltd | Birmingham | 2024 |
| Pristine Clearances Ltd | Bradford | 2026 |
| Pristine Waste Clearance Ltd | Pinner | 2026 |
| Pristine Waste Management Ltd | Pinner | 2026 |
| Pristine Water Treatment Services Ltd | London | 2019 |
| Pristineflow Solutions Ltd | London | 2025 |
| Private Avenue Helmdon Ltd | London | 2024 |
| Private Drainage Limited | Braintree | 2019 |
| Private Water Co. Ltd | Ulverston | 2020 |
| Private Water Scotland Ltd | Tain | 2024 |
| Pro Active Environmental Services Limited | Salford | 2021 |
| Pro Clear Services Ltd | Pontypridd | 2024 |
| Pro Composite Recycling Ltd | England | 2022 |
| Pro Dispose UK Limited | Ashford | 2021 |
| Pro Drain Inspections Limited | Basildon | 2026 |
| Pro Drainage and Civils Ltd | Birtley | 2023 |
| Pro Environmental Ltd | Nottingham | 2017 |
| Pro Grab Limited | Leicester | 2018 |
| Pro Network Logistics Ltd | London | 2025 |
| Pro Restore Ltd | Manchester | 2019 |
| Pro Scan Drainage Specialists Ltd | Derby | 2023 |
| Pro Scoop Ltd | St. Austell | 2024 |
| Pro Sweep Ltd | Eastleigh | 2026 |
| Pro Tyre Recycling Ltd | Shotts | 2016 |
| Pro Utilities Ltd | Norwich | 2021 |
| Pro Waste (Pembs) Limited | Saundersfoot | 2013 |
| Pro Waste Solutions Ltd | Dagenham | 2026 |
| Pro-Cat Ltd | London | 2017 |
| Pro-Innovation Solutions Limited | Stockport | 2012 |
| Pro-Jet Draincare Ltd | Wakefield | 2011 |
| Pro-Logistics (South East) Limited | Maidenhead | 2015 |
| Pro-Waste-Removal Limited | Bedford | 2018 |
| PRO1 Materials Ltd | Chertsey | 2026 |
| Probate Solutions Limited | Ipswich | 2026 |
| Probiance Services Ltd | London | 2023 |
| Probio Energy International Limited | Prestwick | 2016 |
| Probio Energy PVT Limited | Bradford | 2021 |
| Problem Solved Waste Services Ltd | Hamilton | 2025 |
| Process Partners Limited | Wirral | 1992 |
| Process Solutions Limited | Derbyshire | 2005 |
| Proclime Limited | Warminster | 2007 |
| Procommhs Ltd. | Risley | 2017 |
| Prodrain Solutions Ltd | Bradford | 2024 |
| Proeconomy Limited | Milton Keynes | 1993 |
| Professional Catalyst Refiners Ltd | Darlington | 2012 |
| Professional Hygiene Limited | Bristol | 2006 |
| Professional Remediation Limited | Greater Manchester | 2009 |
| Proficio Capital Ltd | Ipswich | 2016 |
| Profile Handling Limited | Solihull | 1997 |
| Profile Handling Services Ltd | Solihull | 2020 |
| Profix Surface Solutions Limited | Londonderry | 2017 |
| Proflex MAN & Van Limited | Dagenham | 2026 |
| Proflo Plumbing & Drainage Ltd | Rochester | 2019 |
| Profluent Services Ltd | Hertford | 2018 |
| Progreen Waste Removal Ltd | High Wycombe | 2026 |
| Progress Cleaning Services (Whiteplume) Limited | Southampton | 1966 |
| Progress Energy (NI) Ltd | Dromore | 2013 |
| Progressive Waste Solutions Ltd | Loanhead | 2018 |
| Progroup Construction Limited | London | 2019 |
| Project 86 Property Maintenance Ltd | Teddington | 2016 |
| Project BFM Ltd | Cradley Heath | 2026 |
| Project Building Company Limited | London | 1990 |
| Project City Marketing Ltd | Bournemouth | 2017 |
| Project Design Solutions Ltd | Stoke On Trent | 2024 |
| Project J.D Consultancy Ltd | Chelmsford | 2023 |
| Project Red Recycling Limited | Pontyclun | 2015 |
| Project Waste Limited | Long Bennington | 2024 |
| Project X Waste Management Ltd | Aylesbury | 2026 |
| Project Yellow Recycling Limited | Llantrisant | 2016 |
| Projectdrains Group Limited | Portsmouth | 2022 |
| Prolakeballs Limited | Southport | 2015 |
| Proline Trading Limited | Liverpool | 2022 |
| Prolinq Ltd | Gravesend | 2018 |
| Promcare UK Limited | Ashby De La Zouch | 2015 |
| Pronto Skip Ltd | Wisbech | 2022 |
| Prop Farm Limited | Nr Cresswell | 1982 |
| Proper Drainage & Plumbing Ltd | London | 2021 |