If engineering interests you, and you're really concerned about becoming over specialised, then I'd recommend mechanical or electronic.
Not concerned about being over specialised. I suppose my main concern was if I done the Aero degree, got in with an aircraft manufacturing company and the economy went per shaped down the line for example, would I get into other Engineering work? Though I can't see Aircraft and Spacecraft production slowing down!
I was looking through the different Universities that provide Aerospace Engineering. I noticed the course at Southampton is still called Aeronautics and Astronautics. I'm guessing they just haven't changed the name of the course as it's the same as the Aerospace Degrees elsewhere?