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