Ah Mad_Jock, why not Scotland...?
Agree with Tinstaafl, airways not too crowded, ATC helpful providing r/w in use, QNH, wind and basically, the bare minimum of info that that would enable you to attempt an approach.(Yup, accept that additional info should be sought for the test, however the basics are there).
Perth is not a bad spot - again, whilst uncontrolled, they do have helpful chaps in the tower who will do their best to give you a dig out (perhaps subtly clearing the 'hold' for example).
Routes are quite straight forward - Glasgow, Edinburgh, Aberdeen. Not impossible of course to get further afield if doing a back-to-back obviously, but same applies to anywhere really.
Uncluttered airways a help as well.
As a 'back seat pax' out of Cranfield, it would seem that the airways there are a bit more congested than Perth and competition with the 'big boys' for R/T can add to the pressure of the I/R.
Would opt for Perth