Under the Data Protection Act 2018, you have the right to find out what information the government and other organisations store about you. These include the right to:
- be informed about how your data is being used
- access personal data
- have incorrect data updated
- have data erased
- stop or restrict the processing of your data
- data portability (allowing you to get and reuse your data for different services)
- object to how your data is processed in certain circumstances
You also have rights when an organisation is using your personal data for:
- automated decision-making processes (without human involvement)
- profiling, for example to predict your behaviour or interests
Plus more at the link.
Could also contact them and ask about it? Pretty much the same logic as with contacting your local rep except that the EFF has way more clout