Update
Just to thank you all for your replies.
We have booked into the Chateaux M0nhoudou (thanks Beerdrinker!) for three nights in mid September. Sounds a really delightfull spot and all the correspondance is in excellent English (which can't be bad?).
We will use that as a base and fly out to Belle Isle, Quiberon etc, we will also fly down to the Nuits St Georges airstrip (thanks eyeinthesky!) for a recce.
Thanks again chaps.
JC