I'm quite lucky -- the interviews at my chosen college (Trinity) were done by a fluid dynamics and a mathematics proffesor
And also, I wouldn't mind doing all the other engineering stuff *and* still have the chance to specialise in Aero Eng (aerodynamics / CFD etc).
I'll admit to having fallen in love with the place. And RAF Wyton (home of ULAS and CUAS) is a damn sight closer to Cambridge than London ...