No professional qualifications, but I guess having a first helped Also - OU degrees are good because they usually mean that you’ve learnt to time manage study and (usually full-time) work, which is particuarly relevant for ACA training contracts.
As a subject I think music is good because you can talk about performing - working under pressure, working in groups, organising rehearsals etc - as well as the usual academic skills.
I suppose what I want to say is that if you’ve got a good degree, it doesn’t matter where from or what its in. Make the best of your experiences, try to ignore statistics about application numbers and success rates and just GO FOR IT! What have you got to lose?
(I’m only saying all this now because I wish someone had said it to me a few weeks ago!)