| Acas | Fortel Group | NS&I |
| Accenture | Freesat | O. U. Khandokar |
| Action for Children | Freshfields Bruckhaus Deringer LLP | O2 (Telefónica UK) |
| Admiral Group plc | Fujitsu | Ofcom |
| Age UK | GB3 | Office for National Statistics (ONS) |
| Ageas Insurance | General Mills UK | Office of the Advocate General for Scotland |
| Aiimi | Genome Research Ltd | Oil & Gas Authority |
| ALDI Stores Ltd | GILBERT-ASH LIMITED | Osborne Clarke LLP |
| Allianz Insurance Plc | GLA | OVO |
| Amey plc | Goldman Sachs | PageGroup |
| Anglian Water Services | Government Internal Audit Agency (GIAA) | Palace for Life Foundation |
| Anglo American | Government Legal Department | Paul J Watson Solicitor |
| Aon plc | Gowling WLG | Pearson Plc |
| ARUP | Grant Thornton UK LLP | Peninsula Business Services |
| ASOS plc | Greater Manchester Health and Social Care Partnership | Pension Protection Fund |
| Association of British Insurers | Greene King | People’s Energy |
| Assura plc | Ground Control Ltd | Pepsico |
| Assurant | Guardian Media Group | Pertemps |
| Atalian Servest | gunnercooke llp | Phoenix Group |
| Atos | Gympass | Pinsent Masons |
| Auto Trader UK | Hachette UK | Place2Be |
| Avanade UK Ltd | HarperCollins Publishers | pladis |
| AVIVA | Harrow Council | Police Service of Northern Ireland |
| AWE | Health & Safety Executive | Post Office |
| AXA UK & Ireland | Health and Research Authority | Prime People |
| Bain & Company | Health Assured Ltd | PSI Talent Management |
| Baker McKenzie | Health Education England | Public Health England |
| BAM Nuttall Ltd | HEARST UK | Publicis Groupe UK |
| Bank of America | Heart of Kent Hospice | Punter Southall Aspire |
| Bank of England | High Speed Two Ltd. (HS2) | PwC |
| Bank of Ireland | Hilton | Qwest Services |
| Bank of Nova Scotia | Hiscox | Reach South Academy Trust |
| Barclays | HM Land Registry | Recruitment and Employment Confederation (REC) |
| Baringa Partners | HM Prison and Probation Service | Reed Exhibitions |
| Barnardo's | HM Revenue and Customs | Reed in Partnership |
| Barratt Developments PLC | HM Treasury (HMT) | Reed Wellbeing |
| bartlett mitchell Ltd | HML Group | Reward Gateway |
| BASF | Hodge Jones & Allen Solicitors | Ricoh UK |
| BAT | Hogan Lovells | Riverside |
| Bates Wells LLP | Home Group | Rocking Horse Pictures Ltd |
| Bauer Media Group UK | Home Office (HO) | Royal Academy of Engineering |
| BCS Consulting | HomeServe Membership Limited | Royal Air Force |
| BDO LLP | Horwich Farrelly Solicitors | Royal Borough of Greenwich |
| Beazley | Hotel Chocolat | Royal College of Veterinary Surgeons |
| Birmingham City Council | House of Commons | Royal London Group |
| Birmingham Community Health Care Foundation Trust | House of Lords | Royal Mail |
| Black Training and Enterprise Group | Houses of Parliament Restoration and Renewal | Royal Navy |
| BlackRock | Hoxby | Royal Society for Public Health |
| Blake Morgan LLP | HSBC UK | RPC |
| BMG | Hudson RPO | RSA Insurance plc |
| BNP Paribas UK CIB | Human Tissue Authority | RSM |
| Boots UK | IBM UK Limited | Saatchi and Saatchi |
| Bourne Leisure | ICP NURSERIES LIMITED | Sainsbury's |
| Bouygues Construction UK | Immediate Future Ltd | Santander |
| BPDTS Ltd | Impact Creative Recruitment Ltd | Savills |
| Bramwith Consulting | Insolvency | Schroders |
| Brand Advance | Institute of Development Studies | Science in Sport PLC |
| Brewin Dolphin | Intellectual Property Office | Scott Dunn |
| Bridgewater Community Healthcare NHS Foundation Trust | InterContinental Hotels Group | Scottish Government |
| Brit Insurance | Invesco | Scriberia |
| British Airways | Investec plc | Senedd Commission |
| British Army | Involved Solutions | Severn Trent |
| British Film Institute (BFI) | Ipsos MORI | Shakespeare Martineau |
| British Land | IRIS Software Group | Shawbrook Bank |
| Brown-Forman UK | Irwin Mitchell | Sheffield United Community Foundation |
| BT | ITN | Shell |
| Bupa Global & UK | J.P. Morgan | Shoosmiths |
| Burges Salmon | Jacobs | Siemens UK and Ireland |
| Business Disability Forum | Jaguar Land Rover | Sir Robert McAlpine |
| Business in the community | Just Group plc | Skanska UK |
| Cabinet Office (CO) | KPMG | Skipton Building Society |
| Calderdale Council | L&Q | Sky |
| Canada Life Limited | L’Oreal UK and Ireland | SkyBlue Solutions |
| Capgemini UK | Lambeth Council | Slaughter and May |
| Capital One UK | Leeds Arts University | SLR Consulting |
| Capsticks Solicitors LLP | Leeds Building Society | Sodexo UK & Ireland |
| Cardiff Council | Legal & General Group plc | Softcat plc |
| Care Quality Commission | Leicester Diocesan Board of Finance | Sopra Steria |
| Carpmaels & Ransford LLP | Leicestershire Police | Sovereign Housing Association |
| Casual Dining Group | Lexis Nexis Risk Solutions | Sport England |
| CBRE UK Ltd | LexisNexis Legal and Professional | Sports Chaplaincy UK |
| Central England Co-operative | Lincolnshire Co-operative | SQA |
| Centrica PLC | Linkedin | SSCL |
| Channel 4 | Linklaters | St Mungo's |
| Chartered Institute of Personnel and Development (CIPD) | Lloyds Banking Group | St. James’s Place Wealth Management |
| Chartered Insurance Institute | Lloyd's | Standard Chartered |
| Chaucer | Llywodraeth Cymru / Welsh Government | Standard Life Aberdeen |
| Choice Support | London Borough of Barking and Dagenham | Stephenson Harwood |
| Christie's | London Borough of Havering | Swansea Building Society |
| Chubb | London Fire Brigade | TalkTalk |
| Cisco | London Legacy Development Corporation | Tate |
| CITI | London North Eastern Railway (LNER) | Taylor Bennett Foundation |
| City of London Corporation | London Stock Exchange Group | Teach First |
| Civil Service | Loungers PLC | Teesside University |
| CK Group | LV= General Insurance | Tesco |
| Cleanbrite (UK) Ltd | Lyndon Goode Architects | Thames Water Utilities Ltd |
| Close Brothers Group | M&G Prudential | The Business of Fashion |
| CMS | M&S Bank | The Christie NHS Foundation Trust |
| Colas UK | M2A Media | The Collective |
| Coleg y Cymoedd | Mace | The Co-Operative Bank |
| Colt Technology Services | Man Group plc | THE EDGE PICTURE COMPANY |
| Community Gateway Association | Marks & Spencer | The Gate London |
| Community union | Mayer Brown | The Growth Company |
| Compass Group | Mazars | The Gym Group |
| Competition and Markets Authority (CMA) | Mc&T | The Hepatitis C Trust |
| Confederation of British Industry (CBI) | McDonald’s Restaurants Ltd | The House of Commons and Parliamentary Digital Service |
| Cooley LLP | MCFT | The Investment Association |
| Costain | MediaCom | The London Borough of Tower Hamlets |
| Coutts | Medicine and Healthcare Regulatory Authority | The London Clinic |
| Covea Insurance | Mental Health at Work | The Midcounties Co-operative |
| Credit Suisse | Mental Health First Aid England | The North East Ambulance Service NHS Foundation Trust |
| Croner Group Ltd | Mental Health Foundation | the RSA |
| Crossroads Together | Mercedes-Benz Financial Services | The Sovini Group |
| Crown Commercial Service | Mercer | The Stylist Group Ltd |
| Crown Prosecution Service | Metropolitan Thames Valley Housing | The Telegraph |
| DEFRA | MI5 | The Tutu Foundation |
| Delaware North UK | MI6 | The West Brom. |
| Deloitte | Middlesbrough College Group | The7stars(UK) |
| Dentsu Aegis Network | Mills & Reeve | TheCityUK |
| Department for Business Energy and Industrial Strategy (BEIS) | Mindset Mental Health Ltd | Tideway |
| Department for Digital Culture, Media and Sport (DCMS) | Ministry of Defence (MOD) | Transparency International UK |
| Department for Education (DfE) | Ministry of Housing Communities and Local Government | TSB Bank plc |
| Department for Exiting the European Union (DExEU) | Ministry of Justice (MOJ) | UBS |
| Department for Health and Social Care (DHSC) | M-Integrated Solutions PLC | UK Athletics |
| Department for International Trade (DIT) | Mitcham Belle Coaches | UK Export Finance |
| Department for Transport | Mitie | UK Government Investments |
| Department for Work and Pensions (DWP) | Models 1 | UK Greetings |
| Derbyshire Healthcare NHS Foundation Trust | Moneysupermarket Group | Unibail-Rodamco-Westfield |
| Deutsche Bank | Morgan Stanley International | Unilever UK Ltd |
| Diageo | Morson Group | Unite Students |
| Dimensions | Moto Hospitality Ltd | United Culture |
| Direct Line Group | Motorola Solutions | University of Huddersfield |
| Dixons Carphone | Mott MacDonald | University of Leeds |
| Docklands Creative | MTR Elizabeth line | University of St Andrews |
| Dr Zigs | Nando’s UK and Ireland | University of Warwick |
| DWF Law | NatCen Social Research | Unruly |
| Dynamic Group | National Assembly for Wales | Unum |
| East Midlands Railway | National Audit Office | Valuation Office Agency - GOV.UK |
| easyJet Plc. | National Grid | Vaultex UK Ltd |
| EDF Energy | National Institute for Health and Care Excellence (NICE) | ViacomCBS Networks International |
| EllisKnight International Recruitment | National Police Chiefs Council | Victim Support |
| Elsevier B.V. | Nationwide | Virgin Care |
| ENGIE UK | NatWest Group | Virgin Limited Edition |
| Ennismore | NCA - National Crime Agency | Virgin Management |
| Enterprise Rent-A-Car | NCHA (Nottingham Community Housing Association) | Virgin Money UK plc |
| Environment Agency | Nestlé UK & Ireland | Virgin Red |
| Essentra | Network Rail | Vitality |
| European Bank for Reconstruction and Development (EBRD) | Nexus | Vodafone UK |
| EVCOM (Event and Visual Communication Association) | NHS | wagamama |
| Eversheds Sutherland | NHS Business Services Authority | Watson Farley & Williams |
| Experian | NHS England | WDH |
| EY | NHS Resolution | Weightmans LLP |
| F1 recruitment ltd | NHS Salford CCG | Wellcome Trust |
| Family Assurance Friendly Society | NHS Shared Business Services | Welsh Water |
| FCO Services | NHS North East London Commissioning Support Unit | Wesleyan |
| FDM Group | Nomura International | West Midlands Police |
| Federated Hermes – International | North Staffordshire Combined Healthcare NHS Trust | Westminster City Council |
| Fidelity International | North Star | WH Smith PLC |
| FIELD STUDIES COUNCIL (FSC) | North West Ambulance Service NHS Trust | Whistl UK Ltd |
| Financial Conduct Authority | Northern Care Alliance NHS ( Salford and Pennine Acute Hospitals) | Whitbread PLC |
| Financial Ombudsman Service | Northern Ireland Office | William Grant & Sons |
| Financial Reporting Council | Northern Trust | WM Morrisons PLC |
| Financial Services Compensation Scheme | Northumbrian Water Limited | Worldline |
| Financial Times | Norton Rose Fullbright | WPP plc |
| Food Standards Agency | Nottingham City Homes | YSC Consulting |
| Foreign, Commonwealth and Development Office (FCDO) | Nottinghamshire County Council | Zurich Insurance UK |
| Forest Holidays | NPTC Group of Colleges | |
