Relocation advice

[Actonmum]

We currently live in West London but are looking to make a move out to be near a good grammar school. Ideally a co-ed one. We have one girl about to go into year 5 and a boy about to enter year 2. Can anyone suggest any good locations in Bucks, Slough or Reading within an hours commute to London where there is a good grammar school and also the possibility of a good primary school for my son.
Any suggestions gratefully received.

Thank you.