I have just completed an MEng in Aernautical Engineering at Bristol. This means that it took 4 years, instead of 3 for a BEng.
What G said is pretty much correct, although when I started, the standard offer from Bristol university was AAB.
The core subjects such as Maths, Aerodynamics, Structures & Materials and control theory run throughout the course.
But you will also cover management techniques, basic electronics and many other subjects.
There are opportunities to select various options, especially towards the end of your course. For example, you may wish to study rotary wing, or many people do a language or psychology element to their course for a bit of variety.
In terms of jobs, there are limitless possibilities.
Graduate engineers are in short supply at the moment, so those who decide to stay in the engineering industry are in great demand.
Having said that, if you do decide to leave the engineering industry, the accounting and finance sector look very favourably upon engineers as do most other sectors requiring degrees for a managment position.
From my year at uni, we have a few people going into engineering, a few pilots (military & civil), a few accounting and finance, a couple in IT, one working for charity and one going to be a pub landlord!
So keep an open mind. An Aero Eng degree is hard work, and can be fairly academic, but if it's what you want to do, it will stand you in good stead for the future.