I'm terribly sorry if this has been asked before, but at the moment I want to work in Nuclear Fusion eventually, MCF like JET etc. seems the most interesting although ICF like NIF is pretty interesting too.. However, many people change their mind over what they want to study whilst they are an undergrad, and I have received a 3k a year scholarship from Exeter Uni which although it has a good astrophysics department, doesn't have a plasma physics department. It does however have good research in other interesting areas of physics such as medical imaging and condensed matter. So would I still be able to do a PhD in plasma physics even if I hadn't studied it at undergrad so long as I get a good degree? Or are they really tight on entry requirements? Because the scholarship is really handy as it means I don't have to work during term-time and can concentrate on studying and given that Exeter is the 8th best physics dept. in the country and has good research areas it's not like I'm losing out on much by going there. But obviously if PhDs are really strict then going there would pretty much kill my chances of ever getting to work in fusion, although I suppose that I could do a masters year if it was really necessary in any case.. so I will pretty much certainly take the scholarship but do you have any advice?