I am a Chartered Accountant (ACA), qualified in 2006 after 3 years at my top 10 firm. I would agree with everyone who says not to do A&F degree as a precursor to an accounting qualification.
I had completed a Physics degree, and in my cohort, people had degrees in Geography, English, Maths, Law, Physics, PPE and a couple had done A&F degrees. When you start at your firm, everyone starts from the same base, they assume you know nothing about accounting. From memory the few who had done A&F degrees got a couple of exemptions, and spent most of our study time chatting, as they had covered some of the material previously.
Being under a training contract is not like having a normal job. The majority of grads in his peer group will have finished uni in the previous 1-2 years, and you have a lot of study time off. It's like being at a second uni! Obviously my experience was pre-Covid, however us grads used to be out Wednesday-Friday night every week, and had lots of weeks where we only went to college. E.g. I started in the September of one year, and until the January 4 months later, had only spent a week in the office, hadn't met any clients yet, but had studied for, and passed 2 exams. Accounting is a great foundation qualification for going into any kind of business, and I still love it almost 20 years after I started.