This page contains a list of all the UK government departments and other public organisations we can investigate.
You can also use our complaint checker tool 'Can we look into your complaint?' to find out if we can investigate the organisation you want to complain about. It will take you to the correct complaint form.
If you are still not sure, this page will tell you what we can and can't help with or you can ring us 0345 015 4033.
- Defence Nuclear Safety Committee
- Defence Scientific Advisory Council
- DEFRA Science Advisory Council
- Department for Business and Trade (DBT)
- Department for Business, Energy and Industrial Strategy
- Department for Business, Innovation and Skills (BIS) - now Department for Business, Energy and Industrial Strategy
- Department for Communities and Local Government (DCLG)
- Department for Culture, Media and Sport (DCMS)
- Department for Education (DfE)
- Department for Energy Security and Net Zero (DESNZ)
- Department for Environment, Food and Rural Affairs (DEFRA)
- Department for Exiting the European Union (DExEU)
- Department for International Development (DfID)
- Department for International Trade
- Department for Science, Innovation and Technology
- Department for Transport (DfT)
- Department for Work and Pensions (DWP)
- Department of Energy and Climate Change (DECC) - now Department for Business, Energy and Industrial Strategy
- Department of Health (DfH)
- Director of Fair Access to Higher Education
- Director of Labour Market Enforcement
- Disabled Persons Transport Advisory Committee
- Disclosure and Barring Service
- Drinking Water Inspectorate
- Driver and Vehicle Standards Agency
- DVLA (Driver and Vehicle Licensing Agency)