| Acas | Freshfields Bruckhaus Deringer LLP | Omni RMS |
| Accenture | Fujitsu | Osborne Clarke LLP |
| ACS | Gamesys Group plc | OVO |
| Action for Children | GB3 | PageGroup |
| Admiral Group plc | General Mills UK | Palace for Life Foundation |
| Aegon Asset Management | Genome Research Ltd | Paul J Watson Solicitor |
| Aegon UK | GILBERT-ASH LIMITED | Pearson Plc |
| Age UK | GLA | Peninsula Business Services |
| Ageas Insurance | Goldman Sachs | Pension Protection Fund |
| Aiimi | Government Internal Audit Agency (GIAA) | People’s Energy |
| Air Products | Government Legal Department | Pepsico |
| ALDI Stores Ltd | Gowling WLG | Pertemps |
| Allianz Insurance Plc | Grant Thornton UK LLP | Phoenix Group |
| Amey plc | Greater Manchester Health and Social Care Partnership | Phoenix Software |
| Andron Facilities Management | Greene King | Pinsent Masons |
| Anglian Water Services | Ground Control Ltd | Place2Be |
| Anglo American | Guardian Media Group | pladis |
| Aon plc | gunnercooke llp | Police Service of Northern Ireland |
| AQA | Gympass | Post Office |
| ARUP | Hachette UK | Prime People |
| ASOS plc | Hargreaves Lansdown | Prince’s Trust International |
| Association of British Insurers | HarperCollins Publishers | Procter and Gamble |
| Assura plc | Harrow Council | PSI Talent Management |
| Assurant | Health & Safety Executive | Public Health England |
| Atalian Servest | Health and Research Authority | Publicis Groupe UK |
| Atos | Health Assured Ltd | Punter Southall Aspire |
| Auto Trader UK | Health Education England | PwC |
| Avanade UK Ltd | HEARST UK | Qwest Services |
| AVIVA | Heart of Kent Hospice | Raytheon UK |
| AWE | High Speed Two Ltd. (HS2) | Reach South Academy Trust |
| AXA UK & Ireland | Hilton | Reading Borough Council |
| Bain & Company | Hiscox | Recruitment and Employment Confederation (REC) |
| Baker McKenzie | HM Land Registry | Reed Exhibitions |
| BAM Nuttall Ltd | HM Prison and Probation Service | Reed in Partnership |
| Bank of America | HM Revenue and Customs | Reed Wellbeing |
| Bank of England | HM Treasury (HMT) | Reward Gateway |
| Bank of Ireland | HML Group | Ricardo Energy & Environment |
| Bank of Nova Scotia | Hodge Jones & Allen Solicitors | Ricoh UK |
| Barclays | Hogan Lovells | Riverside |
| Baringa Partners | Home Group | Rocking Horse Pictures Ltd |
| Barnardo's | Home Office (HO) | Royal Academy of Engineering |
| Barratt Developments PLC | HomeServe Membership Limited | Royal Air Force |
| bartlett mitchell Ltd | Horwich Farrelly Solicitors | Royal Borough of Greenwich |
| BASF | Hotel Chocolat | Royal College of Veterinary Surgeons |
| BAT | House of Commons | Royal London Group |
| Bates Wells | House of Lords | Royal Mail |
| Bauer Media Group UK | Houses of Parliament Restoration and Renewal | Royal Navy |
| BCS Consulting | Hoxby | Royal Society for Public Health |
| BDO LLP | HSBC UK | RPC |
| Beazley | Hudson RPO | RSA Insurance plc |
| Big Yellow Group PLC | Human Tissue Authority | RSM |
| Birmingham City Council | IBM UK Limited | Saatchi and Saatchi |
| Birmingham Community Health Care Foundation Trust | ICP NURSERIES LIMITED | Sainsbury's |
| Black Training and Enterprise Group | Immediate Future Ltd | Santander |
| BlackRock | Impact Creative Recruitment Ltd | Savills |
| Blake Morgan LLP | Incyte International Ltd | Schroders |
| BMG | Insolvency | Science in Sport PLC |
| BNP Paribas UK CIB | Institute of Development Studies | ScotRail |
| Boots UK | Intellectual Property Office | Scott Dunn |
| Bourne Leisure | InterContinental Hotels Group | Scottish Government |
| Bouygues Construction UK | Invesco | Scriberia |
| BPDTS Ltd | Investec plc | Sellafield Ltd |
| Bramwith Consulting | Involved Solutions | Sellick Partnership |
| Brand Advance | Ipsos MORI | Senedd Commission |
| Brewin Dolphin | IRIS Software Group | Seven Investment Management LLP (7IM) |
| Bridgewater Community Healthcare NHS Foundation Trust | Irwin Mitchell | Severn Trent |
| Brighton & Hove City Council | ISS UK | Shakespeare Martineau |
| Brit Insurance | ITN | Shawbrook Bank |
| British Airways | J.P. Morgan | Sheffield United Community Foundation |
| British Army | Jacobs | Shell |
| British Film Institute (BFI) | Jaguar Land Rover | Shoosmiths |
| British Land | Just Group plc | Siemens UK and Ireland |
| Brown-Forman UK | KPMG | Sir Robert McAlpine |
| BT | L&Q | Skanska UK |
| Bupa Global & UK | L’Oreal UK and Ireland | Skipton Building Society |
| Burges Salmon | Lambeth Council | Sky |
| Business Disability Forum | Landsec | SkyBlue Solutions |
| Business in the community | Leeds Arts University | Slaughter and May |
| Cabinet Office (CO) | Leeds Building Society | SLR Consulting |
| Calderdale Council | Legal & General Group plc | Sodexo UK & Ireland |
| Canada Life Limited | Leicester Diocesan Board of Finance | Softcat plc |
| Capgemini UK | Leicestershire Police | Sopra Steria |
| Capita | Lexis Nexis Risk Solutions | Sovereign Housing Association |
| Capital One UK | LexisNexis Legal and Professional | Spirit Energy |
| Capsticks Solicitors LLP | Lincolnshire Co-operative | Sport England |
| Cardiff Council | Linkedin | Sports Chaplaincy UK |
| Care Quality Commission | Linklaters | SQA |
| Carpmaels & Ransford LLP | Lloyds Banking Group | SSCL |
| Casual Dining Group | Lloyd's | St Mungo's |
| CBRE UK Ltd | Llywodraeth Cymru / Welsh Government | St. James’s Place Wealth Management |
| Central England Co-operative | London Borough of Barking and Dagenham | Standard Chartered |
| Centrica PLC | London Borough of Havering | Standard Life Aberdeen |
| Channel 4 | London Fire Brigade | Stephenson Harwood |
| Chartered Institute of Personnel and Development (CIPD) | London Legacy Development Corporation | SURREY POLICE |
| Chartered Insurance Institute | London North Eastern Railway (LNER) | Swansea Building Society |
| Chaucer | London Stock Exchange Group | TalkTalk |
| CHEP UK | Loungers PLC | Tate |
| Choice Support | LV= General Insurance | Taylor Bennett Foundation |
| Christie's | Lyndon Goode Architects | Teach First |
| Chubb | M&G Prudential | Teesside University |
| Cisco | M&S Bank | Teneo |
| CITI | M2A Media | Tesco |
| City of London Corporation | Mace | Thames Water Utilities Ltd |
| Civil Service | Make-A-Wish UK | The Business of Fashion |
| CK Group | Man Group plc | The Christie NHS Foundation Trust |
| Cleanbrite (UK) Ltd | Marks & Spencer | The Collective |
| Close Brothers Group | Mayer Brown | The Co-Operative Bank |
| CMS | Mazars | The Crown Estate |
| Colas UK | Mc&T | THE EDGE PICTURE COMPANY |
| Coleg y Cymoedd | McDonald’s Restaurants Ltd | The Electoral Commission |
| Colt Technology Services | MCFT | The Gate London |
| Community Gateway Association | MediaCom | The Gateway Learning Community Trust |
| Community union | Medicine and Healthcare Regulatory Authority | The Growth Company |
| Compass Group | Mental Health at Work | The Gym Group |
| Competition and Markets Authority (CMA) | Mental Health First Aid England | The Hepatitis C Trust |
| Confederation of British Industry (CBI) | Mental Health Foundation | The House of Commons and Parliamentary Digital Service |
| Cooley LLP | Mercedes-Benz Financial Services | The Investment Association |
| Costain | Mercer | The London Borough of Tower Hamlets |
| Coutts | Metropolitan Thames Valley Housing | The London Clinic |
| Covea Insurance | MI5 | The Midcounties Co-operative |
| Credit Suisse | MI6 | The North East Ambulance Service NHS Foundation Trust |
| Croner Group Ltd | Middlesbrough College Group | the RSA |
| Crossroads Together | Mills & Reeve | The Sovini Group |
| Crown Commercial Service | Mindset Mental Health Ltd | The Stylist Group Ltd |
| Crown Prosecution Service | Ministry of Defence (MOD) | The Telegraph |
| DEFRA | Ministry of Housing Communities and Local Government | The Tutu Foundation |
| Delaware North UK | Ministry of Justice (MOJ) | The West Brom. |
| Deloitte | M-Integrated Solutions PLC | The7stars(UK) |
| Dentsu Aegis Network | Mitcham Belle Coaches | TheCityUK |
| Department for Business Energy and Industrial Strategy (BEIS) | Mitie | Tideway |
| Department for Digital Culture, Media and Sport (DCMS) | Models 1 | Transparency International UK |
| Department for Education (DfE) | Moneysupermarket Group | Trilogy Real Estate LLP |
| Department for Exiting the European Union (DExEU) | Morgan Stanley International | TSB Bank plc |
| Department for Health and Social Care (DHSC) | Morson Group | UBS |
| Department for International Trade (DIT) | Moto Hospitality Ltd | UK Athletics |
| Department for Transport | Motorola Solutions | UK Export Finance |
| Department for Work and Pensions (DWP) | Mott MacDonald | UK Finance |
| Derbyshire Healthcare NHS Foundation Trust | MTR Elizabeth line | UK Government Investments |
| Deutsche Bank | Murgitroyd & Company Limited | UK Greetings |
| Diageo | Nando’s UK and Ireland | Unibail-Rodamco-Westfield |
| Dimensions | NatCen Social Research | Unilever UK Ltd |
| Direct Line Group | National Assembly for Wales | Unite Students |
| Dixons Carphone | National Audit Office | United Culture |
| DLA Piper UK | National Grid | University of Huddersfield |
| Docklands Creative | National Institute for Health and Care Excellence (NICE) | University of Leeds |
| Dr Zigs | National Police Chiefs Council | University of St Andrews |
| DWF Law | Nationwide | University of Warwick |
| Dynamic Group | NatWest Group | Unruly |
| East Midlands Railway | NCA - National Crime Agency | Unum |
| easyJet Plc. | NCHA (Nottingham Community Housing Association) | Valuation Office Agency - GOV.UK |
| EDF Energy | Nestlé UK & Ireland | Vaultex UK Ltd |
| EllisKnight International Recruitment | Network Rail | ViacomCBS Networks International |
| Elsevier B.V. | New Look | Victim Support |
| ENGIE UK | Nexus | Virgin Care |
| Ennismore | NHS | Virgin Limited Edition |
| Enterprise Rent-A-Car | NHS Business Services Authority | Virgin Management |
| Environment Agency | NHS England | Virgin Money UK plc |
| Environmental Resources Management | NHS Property Services Ltd | Virgin Red |
| Essentra | NHS Resolution | Vitality |
| European Bank for Reconstruction and Development (EBRD) | NHS Salford CCG | VIVID Housing Ltd |
| EVCOM (Event and Visual Communication Association) | NHS Shared Business Services | Vodafone UK |
| Eversheds Sutherland | NHS North East London Commissioning Support Unit | wagamama |
| Experian | Nomura International | Waltham Forest College |
| EY | North Staffordshire Combined Healthcare NHS Trust | Watson Farley & Williams |
| F1 recruitment ltd | North Star | WDH |
| Family Assurance Friendly Society | North West Ambulance Service NHS Trust | Weightmans LLP |
| FCO Services | Northern Care Alliance NHS ( Salford and Pennine Acute Hospitals) | Wellcome Trust |
| FDM Group | Northern Ireland Office | Welsh Water |
| Federated Hermes – International | Northern Trust | Wesleyan |
| Fidelity International | Northumbrian Water Limited | West Midlands Police |
| FIELD STUDIES COUNCIL (FSC) | Norton Rose Fullbright | West Yorkshire Police |
| Financial Conduct Authority | Nottingham City Homes | Westminster City Council |
| Financial Ombudsman Service | Nottinghamshire County Council | WH Smith PLC |
| Financial Reporting Council | NPTC Group of Colleges | Whistl UK Ltd |
| Financial Services Compensation Scheme | NS&I | Whitbread PLC |
| Financial Times | NTT DATA | William Grant & Sons |
| FNZ UK | O. U. Khandokar | Wipro Limited |
| Food Standards Agency | O2 (Telefónica UK) | WM Morrisons PLC |
| Foreign, Commonwealth and Development Office (FCDO) | Ofcom | Wokingham Borough Council |
| Forest Holidays | Office for National Statistics (ONS) | Worldline |
| Fortel Group | Office of the Advocate General for Scotland | WPP plc |
| Freesat | Oil & Gas Authority | YSC Consulting |
| | Zurich Insurance UK |
