| Acas | Financial Reporting Council | NHS North East London Commissioning Support Unit |
| Accenture | Financial Services Compensation Scheme | North Staffordshire Combined Healthcare NHS Trust |
| Action for Children | Financial Times | North West Ambulance Service NHS Trust |
| Admiral Group plc | Food Standards Agency | Northern Care Alliance NHS ( Salford and Pennine Acute Hospitals) |
| Age UK | Freshfields Bruckhaus Deringer LLP | Northern Ireland Office |
| Amey plc | Fujitsu | Northern Trust |
| Anglian Water Services | GLA | Norton Rose Fullbright |
| Anglo American | Goldman Sachs | Nottinghamshire County Council |
| Aon plc | Government Internal Audit Agency (GIAA) | NS&I |
| Assura plc | Grant Thornton UK LLP | Ofcom |
| Atos | Greater Manchester Health and Social Care Partnership | Office of National Statistics (ONS) |
| Auto Trader UK | Greene King | Office of the Advocate General for Scotland |
| AVIVA | Guardian Media Group | Oil & Gas Authority |
| Baker McKenzie | gunnercooke llp | PageGroup |
| Bank of England | Hachette UK | Paul J Watson Solicitor |
| Barclays | HarperCollins Publishers | Pearson Plc |
| Baringa Partners | Health & Safety Executive | Peninsula Business Services |
| Barnardo's | Health and Research Authority | Pension Protection |
| Barratt Developments PLC | Health Assured Ltd | Pertemps |
| Bauer Media Group UK | Health Education England | Place2Be |
| Birmingham Community Health Care Foundation Trust | HEARST UK | Post Office |
| Black Training and Enterprise Group | HM Land Registry | Public Health England |
| BPDTS Ltd | HM Revenue and Customs | PwC |
| Bramwith Consulting | HM Treasury (HMT) | RBS |
| Brand Advance | Hogan Lovells | Reach South Academy Trust |
| Bridgewater Community Healthcare NHS Foundation Trust | Home Office (HO) | Riverside |
| British Airways | Horwich Farrelly Solicitors | Rocking Horse Pictures Ltd |
| British Army | House of Commons | Royal Air Force |
| British Film Institute (BFI) | House of Lords | Royal Mail |
| BT | Hoxby | Royal Navy |
| Business in the community | HSBC UK | Royal Society for Public Health |
| Cabinet Office (CO) | IBM UK Limited | RPC |
| Calderdale Council | Impact Creative Recruitment Ltd | Saatchi and Saatchi |
| Canada Life Limited | Insolvency | Sainsbury's |
| Capgemini UK | Intellectual Property Office | Santander |
| Capsticks Solicitors LLP | ITN | Savills |
| Cardiff Council | J.P. Morgan | Scottish Government |
| Care Quality Commission | Jaguar Land Rover | 'Sheffield United Community Foundation |
| CBRE UK Ltd | KPMG | Shell |
| Centrica PLC | L&Q | Shoosmiths |
| Channel 4 | Lambeth Council | Sir Robert McAlpine |
| Chartered Institute of Personnel and Development (CIPD) | Leeds Arts University | Sky |
| Chartered Insurance Institute | Leeds Building Society | Slaughter and May |
| Christie's | Legal & General Group plc | Sodexo UK & Ireland |
| CITI | Linkedin | Sopra Steria |
| City of London Corporation | Linklaters | Sport England |
| Civil Service | Lloyds Banking Group | SSCL |
| Close Brothers Group | Lloyd's | St Mungo's |
| CMS | Llywodraeth Cymru / Welsh Government | St. James’s Place Wealth Management |
| Competition and Markets Authority (CMA) | London Borough of Barking and Dagenham | Standard Life Aberdeen |
| Confederation of British Industry (CBI) | London Borough of Havering | Tate |
| Costain | London Fire Brigade | Taylor Bennett Foundation |
| CPS | London Legacy Development Corporation | Teesside University |
| Croner Group Ltd | M&G Prudential | Tesco |
| DEFRA | Marks & Spencer | The Christie NHS Foundation Trust |
| Deloitte | Mayer Brown | The Co-Operative Bank |
| Dentsu Aegis Network | Mazars | The Gate London |
| Department for Business Energy and Industrial Strategy (BEIS) | MediaCom | The House of Commons and Parliamentary Digital Service |
| Department for Digital Culture, Media and Sport (DCMS) | Medicine and Healthcare Regulatory Authority | The Investment Association |
| Department for Education (DfE) | Metropolitan Thames Valley Housing | The London Borough of Tower Hamlets |
| Department for Exiting the European Union (DExEU) | MI5 | The North East Ambulance Service NHS Foundation Trust |
| Department for Health and Social Care (DHSC) | MI6 | The Sovini Group |
| Department for International Development (DFID) | Middlesbrough College Group | The Telegraph |
| Department for International Trade (DIT) | Ministry of Defence (MOD) | The7stars(UK) |
| Department for Transport | Ministry of Housing Communities and Local Government | Tideway |
| Department for Work and Pensions (DWP) | Ministry of Justice (MOJ) | TSB Bank plc |
| Derbyshire Healthcare NHS Foundation Trust | M-Integrated Solutions PLC | UBS |
| Diageo | Mitcham Belle Coaches | UK Athletics |
| Dimensions | Morgan Stanley International | UK Government Investments |
| Docklands Creative | Mott MacDonald | Unilever UK Ltd |
| DWF Law | National Assembly for Wales | University of Huddersfield |
| EDF Energy | National Grid | University of St Andrews |
| Enterprise Rent-A-Car | National Police Chiefs Council | Unruly |
| Environment Agency | Nationwide | Valuation Office Agency - GOV.UK |
| Essentra | NCA - National Crime Agency | Viacom International Media Networks (VIMN) |
| European Bank for Reconstruction and Development (EBRD) | NEL | Victim Support |
| Eversheds Sutherland | Network Rail | Vodafone UK |
| EY | NHS | Weightmans LLP |
| F1 recruitment ltd | NHS Business Services Authority | Wellcome Trust |
| FCO Services | NHS England | Westminster City Council |
| FIELD STUDIES COUNCIL (FSC) | NHS Resolution | Whistl UK Ltd |
| Financial Conduct Authority | NHS Salford CCG | WPP plc |
| Financial Ombudsman Service | NHS Shared Business Services | Zurich Insurance UK |
