When you're at the end of your years will you be happy saying you were a great accountant?
What about a great accountant with a PPL who did well in lots of aerobatics competitions?
If neither of those flick your switch then do it. Life is worth more than money, i'd rather die next week chasing a dream than live till i'm 100 doing some job I don't like regretting the dream I didn't chase. Sadly it's not that clear cut.
If you DO chase your dream of being a pilot then set yourself up properly. How much weight do they really place on a physics A-Level? If you think it's a lot then go and do a physics A level in your spare time. Maybe work up your plan B until that is comfortable and look at moving across.
I might be wrong but from what I hear, the slow modular approach will be years of grinding away for very little reward.
Best of luck either way!