I'm doing an undergraduate in astrophysics at the moment. In Sept, I'll have to decide between continuing the single honours in astrophysics or doing a double honours in experimental physics and mathematical physics. My goal is to go on to do a masters, preferably in the UK, in quantum mechanics. How would I know what difference it would make, if any, on my likelihood of being excepted into a post-grad? Flicking through websites the requirements seem to just say relevant undergraduate in physics or maths.