An obvious possible answer to your question is Aeronautical Engineering. Click on 'Aeronautical Engineering' here
http://search.ucas.co...Search.run?y=2012&w=H
and then on 'All Aeronautical Engineering courses' to see which UK universities offer courses.
I'll also refer you back to my earlier answer to you here:
http://www.theanswerb...8.html#answer-5079221
I wonder whether you've followed the link all of the way through to get the maximum amount of information? Start by clicking on the link itself.
From there, click on the names of each of the trainee astronauts on the right. Then click on 'View Bio' to see exactly what each of them has studied.
You'll see that all of the trainee astronauts have several degrees, often in different disciplines and generally at Masters or PhD level. Additionally many of them hold high military rank.
Chris