The FCA's Banking: Conduct of Business Sourcebook (BCOBS) applies to firms when they accept deposits from banking customers and is predominantly aimed at protecting retail customers in respect of banking and payment services they receive. Its key recordkeeping requirement relates to notifications of cancellation rights.
To view the FCA's table of recordkeeping requirements found in BCOBS: https://www.handbook.fca.org.uk/handbook/BCOBS/Sch/1/1.html.
Link to Handbook: https://www.handbook.fca.org.uk/handbook/BCOBS/