Going to study Physics at Uni, should I take Further Maths or Chemistry for A level?

The current subjects I am definitely taking for A level are Physics and Maths. However, I'm not sure on Chemistry or Further Maths.

Which one should I take?

I'm thinking of looking into either astrophysics or quantum mechanics.

Why not do both?

Good point, I could certainly take both... but I kind of wanted my fourth subject to be unrelated from my science stuff, as four science subjects (including maths) would be a bit too stressful.
Should I ask my teachers as well?

The current subjects I am definitely taking for A level are Physics and Maths. However, I'm not sure on Chemistry or Further Maths.

Which one should I take?

I'm thinking of looking into either astrophysics or quantum mechanics.

Honestly, take chemistry.
The math part, you can learn easily.

The chemistry part is much more difficult and will help you a lot in Physics. Chemistry and Physics are very integrated. With Chemistry, understanding physics is much more easier.
How would you even understand orbitals, atomic structure, bonding, reactions, equilibria, born-haber cycles, gibbs free energy etc without taking chemistry???.........
These topics(especially on the structure of atoms) is very important for the understanding of physics.

To be successful in physics, you must take chemistry. The Further Math requirements can easily be covered in uni and is not necessary.

Edit: I've seen that you have interest in Quantum Physics. This further ensures that you MUST take chemistry. A solid understanding of Chemistry is VERY VERY important for quantum physics.

Contact the universities that you hope to apply to and ask their advice. They will be best placed to tell you which would be more useful and also which would be looked upon more favourably during the applications process. (Some universities prefer you to have a broader education rather than being too narrowly focussed in one subject area.)

Completely disagree! Take FM.Physics at degree level is more maths than any other subject. You will cover FM at degree level, but itll make your first year a hell of a lot less stressful, because its HARD! At Warwick, the first year is 20% of the final degree- and at the offerholders day they advised anyone who wasnt doing FM to swot up on them in the hols because they cover the Fm syllabus inthe first 8 weeks....

You are right but Quantum Physics puts a huge emphasis on chemistry. Whatever, tell him to take both.