I think we have a subject swap here - DS has decided that chemistry is not for him. Ability-wise, its always been about the science - all 9s across the board for sciences/maths/comp sci. But, he's done a week and he says that whilst he could tolerate half of the curriculum, the other half is unbearable.
So... we are on a hunt for other options that fit with the timetable. Technically, he could swap to most things but some options would require switching maths/FM and physics groups. The other maths/FM group comes with a teacher that he just can't tolerate and he's not willing to do it - maths is 'his thing' and he won't compromise on the dodgy FM teacher. So, he's limited to a couple of blocks of the timetable and by the process of elimination we are left with biology, economics or history.
I think its likely to be economics, although its quite a risk. Its a new subject and when he did a new subject at GCSE (business studies) he didn't like it, didn't put in much effort and came away with a 7. He particularly disliked the teacher and it is this teacher that takes A level economics. He also hates essay writing!
He had originally been aiming for A/A* across the board with chemistry in the mix and he admits that he doesn't think he'll get as good a grade in economics (he's already saying he'd be okay with a B). But, he also says he wouldn't get as good a grade in biology or history either. It just seems a shame to be thinking like this so early on - but it seems he really can't stand chemistry!