Can I change the name on my GCSE certificates?Watch
BTW I’m in year 12 now so I should be able to have my new name in my A Level exams.
I know you said it was only to change around some details, but in my experience as a trans person it was a case of getting in touch with everyone individually and it was quite a long process, if only because of the waiting.
In terms of your qualifications once you notify the exam boards of a name change they should instantly apply it to the qualifications too, just keep a few extra copies of your deed poll on hand (I have 20) since from now on whenever your old name comes up you'll need the original deed poll to show the legal chronological change, and sometimes people don't post them back.
Hope this helps!