| A & F Documentation Limited | Haywards Heath | 2011 |
| A & F Engineering Specialists Ltd | Rosyth | 2026 |
| A & F Interactive Limited | London | 2014 |
| A & F Legal Marketing Ltd | London | 2025 |
| A & F Precision Engineering Limited | Norwich | 2011 |
| A & F Ross Limited | Lossiemouth | 2006 |
| A & F Young Ltd | Richmond | 2011 |
| A & G Accountancy Services Limited | Reading | 2008 |
| A & G Accounting Limited | Sheffield | 2024 |
| A & G Architects (Oxford) Ltd | Mountsorrel, Loughborough | 1994 |
| A & G Architects Ltd | Mountsorrel, Loughborough | 2004 |
| A & G Associates Limited | Wallington | 2019 |
| A & G Business Solutions Ltd | Maidstone | 2012 |
| A & G Consultants (NW) Ltd | Liverpool | 2024 |
| A & G Consulting Limited | Nottingham | 2020 |
| A & G Design Services Ltd | Cramlington | 2012 |
| A & G Professional Services Limited | Warrington | 2012 |
| A & G Vets Ltd | Taunton | 2024 |
| A & H Accountants Ltd | Milton Keynes | 2022 |
| A & H Clear Solutions Ltd | Kington | 2026 |
| A & H Coating Inspections Limited | Donaghadee | 2010 |
| A & H Edmonds & Sons Limited | Ashford | 2014 |
| A & H Goldsberg Limited | London | 2015 |
| A & H Immigration Consultancy Ltd | Halifax | 2026 |
| A & H Manchester Ltd | Manchester | 2026 |
| A & H Safety Consultants Limited | Wrexham | 2006 |
| A & H Testing Limited | Durham | 2011 |
| A & H Veterinary Services Limited | Market Drayton | 2020 |
| A & I Accounting Services Limited | Wickford | 2019 |
| A & I Associates Ltd | Cardiff | 2019 |
| A & J Accountancy Limited | Walsall | 2002 |
| A & J Accountancy Services Ltd | Motherwell | 2008 |
| A & J Accounting Limited | Stratford-Upon-Avon | 2025 |
| A & J Agencies Limited | Mitcham | 2012 |
| A & J ARB Properties Limited | Chesterfield | 2013 |
| A & J Architects Limited | York | 2000 |
| A & J Associates Ltd | Leeds | 2025 |
| A & J Beric Associates Limited | London | 1995 |
| A & J Coletta Ltd | Brough | 2015 |
| A & J Construction Services Ltd | Ellesmere Port | 2024 |
| A & J Consultancy (South East) Ltd | East Malling | 2012 |
| A & J Consulting (Midlands) Ltd | Stafford | 2011 |
| A & J Consulting Services Limited | Weybridge | 2024 |
| A & J Day Consulting Limited | Bishops Tachbrook | 2016 |
| A & J Dorman Limited | Bakewell | 2001 |
| A & J Electrical Engineering Ltd | Crediton | 2020 |
| A & J Jones Property Consultants Limited | Southampton | 2021 |
| A & J Matthews Engineering Ltd | Cardiff | 2013 |
| A & J Multi Systems Limited | Wirral | 1987 |
| A & J Project Management Limited | Weybridge | 2003 |
| A & J Ryan Design Services Limited | Sidcup | 2013 |
| A & J Services (Halifax) Limited | Halifax | 2005 |
| A & J Services (Spalding) Limited | Spalding | 2020 |
| A & J Support Limited | Leeds | 2022 |
| A & J Synergy Ltd | Clitheroe | 2026 |
| A & J Wells Limited | Royston | 2015 |
| A & JF Consulting Ltd | Trimdon Station | 2021 |
| A & K Accountancy Services Limited | Harrow | 2003 |
| A & K Accounting and Payroll Services Ltd | Bristol | 2022 |
| A & K Architectural Services Ltd | Bodmin | 2014 |
| A & K Associates Limited | Stamford | 2004 |
| A & K Contract Services Ltd | Loughton | 2021 |
| A & K GAS Consultancy Ltd | Gillingham | 2022 |
| A & K Jones & Company Limited | Staffordshire | 2006 |
| A & K Little Associates Ltd | Chesterfield | 2019 |
| A & K Palmer Consulting Limited | Orpington | 2015 |
| A & K Potash Accounting Services Limited | Chertsey | 2002 |
| A & K Services (London) Limited | London | 2023 |
| A & K Services Ltd | Swindon | 2017 |
| A & K Signalling Ltd | Birmingham | 2019 |
| A & K Trafford Limited | Macclesfield | 2014 |
| A & K Zonfrillo WP Ltd | Billingham | 2024 |
| A & KM Ltd | Aboyne | 2014 |
| A & KT Ashton Ltd | Oldham | 2003 |
| A & L Accountancy Limited | Swansea | 2004 |
| A & L Accounting Limited | Middlesex | 2004 |
| A & L Care Homes Holdings Limited | Plymouth | 2008 |
| A & L Consultancy Ltd | Redditch | 2025 |
| A & L Corporate Services Ltd | Tonbridge | 2018 |
| A & L Mackintosh Consultancy Limited | London | 2024 |
| A & L Supplies (2008) Limited | Markfield | 2008 |
| A & M a Limited | Sunderland | 2011 |
| A & M Accountancy Solutions Ltd | Solihull | 2026 |
| A & M Alldrick Ltd | Tewkesbury | 2022 |
| A & M Bacon Limited | Salford | 1999 |
| A & M Creative Concept Ltd | Milton Keynes | 2023 |
| A & M Elevator Consultants Limited | Spellbrook | 2021 |
| A & M Emsley Consultancy Limited | Sheffield | 2023 |
| A & M Fire Risk Assessors Ltd | Miskin | 2025 |
| A & M Goodwin Ltd | Hinckley | 2020 |
| A & M H.G.V. Resources Limited | Middlesex | 2004 |
| A & M Management Ltd | Middlesbrough | 2025 |
| A & M Management Services Limited | Hertford | 2017 |
| A & M Marble Construction Limited | Hadleigh | 1989 |
| A & M Office Services Limited | Essex | 1997 |
| A & M Projects Ltd | Wigan | 2019 |
| A & M Research and Consulting Ltd | London | 2018 |
| A & M Solicitors Limited | Preston | 2015 |
| A & M Specialist Recruitment Limited | Ilford | 2025 |
| A & M Translation Ltd | Liverpool | 2017 |