about to start looking for my next ff and have about £17k inc mine as a part x or private sale seen a couple of westminsters and vse which offers best value? age millage all being equal? its looks to me the VSE is better or am i missing something

Spec varies by year - so hard to be specific.

Figure out what options you 'need' - like cooled seats, ski hatch, rear seat entertainment etc. then find the best car you can with those. I wouldn't get too hung up on which model it is, but just my opinion.