**Maybe there is some mechanism available..?**

As far as I am aware, the only information that an organisation is obligated to provide is one's Personal Information following a Subject Access Request under GDPR. (I will leave it to others with a better understanding of GDPR to expand on this or correct me if I am wrong.)

**From reading books...**

If you are proposing civil action as  a "Litigant in Person" (i.e. without a lawyer), then you should consider reading the [Civil Procedure Rules](https://www.justice.gov.uk/courts/procedure-rules/civil/rules), especially [Part 31 - Disclosure](https://www.justice.gov.uk/courts/procedure-rules/civil/rules/part31).*


Also worth reading is the [Handbook for Litigants in Person](https://www.judiciary.uk/publications/handbook-litigants-person-civil-221013/) written by the Judiciary as part of their general [Advice for Litigants in Person](https://www.judiciary.uk/you-and-the-judiciary/going-to-court/advice-for-litigants-in-person/). 




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**Just to clarify; the term and processes of "Discovery" no longer exist in the UK, being replaced with "Disclosure" by [Lord Woolf' Reforms](https://www.cms-lawnow.com/ealerts/1999/01/the-woolf-reforms-new-rules-in-the-courts-from-26-april-1999?cc_lang=en) in 1999.*