I graduated in Aero Eng from Loughborough uni a fews years back. After self funding my training and finishing in November, I am now in the CTC ATP scheme holding pool.
If you are set on a career as a pilot choose the degree you will most enjoy and are interested in. If its not aviation based just be sure it's a degree that can help to secure employment in an area you would like to work should the flying not work out.
During my degree I did an industrial placement with BA, and after graduating I worked for a full flight sim manufacturer
So in my case it provided opportunities that I feel helped when applying to some airlines as a pilot.
All the best with your decision.