This site issues a Citizen card
https://www.citizencard.com/what-is-a-citizencard
I had a look at the The Proof of Age Standards Scheme (PASS) and Citizencard is one of the ones participating in the scheme.
If in doubt, contact the website asking for the ID to confirm they will accept Citizencard ID
Once you have the proof required by Citizencard and it's verified, it says the application can be processed within one to two working days for £30 (less than the Provisional licence) or £15 for twenty-one working days.