I guessed that you might be looking at Southampton: the term "Aeronautics and Astronautics" is only used there; most others use "Aerospace Engineering" save possibly Brunel which uses "Aviation Engineering". I'd not get too hung up on the title however.
The thing to watch with selecting University courses for somebody like yourself is that you are going to be taught by people who really are world-class in their subject understanding. Generally, that means the top researchers. For helicopters, the three universities I mentioned have the best in the UK (which to a fair extent still thankfully means world-class).
As it happens, all three are also very good universities, so you're unlikely to regret studying at any of them. Other very good aero universities include Imperial, Loughborough, Sheffield, Brunel (which is new to the game but developing nicely), Manchester and a few others - and of-course Cranfield, but Cranfield whilst superb, only offers postgraduate degrees. That does give you the option however of doing a 3 year BEng(Hons) somewhere else then applying to do one of the 1-year Cranfield MScs, which are probably the best set of aerospace engineering MScs in the world, and includes one (
Flight Dynamics) with a heavy flight test bias
G