Originally Posted by
Piltdown Man
As your son is in the British system, why not keep him there? A strange paradox is that a non-aviation related degree is a better degree for aviation than an aviation one. Why? Because it equips you better for a life outside thus making you a more interesting person to be employed by an airline. Like a diamond, the more facets you have, the more valuable you are.
Mainly because it's expensive
As for a non-aviation degree. It will degrade over years while being away from the subject. Ideally it should be something closely related to flight operations (accident investigation, CRM, management, aircraft performance, whatever else)