This is related to the post on Inheritance Laws posted by Laurence Clary, but warrants a new topic of it's own.
I have been reliably informed that from the 17th August this year, European inheritance laws are changing. Apparently British people living in France with French property will be allowed to decide whether the succession is passed as per the British system or as per the French system. From what I gather you need to be British without any French naturalisation. More details here.
As I say, the source is reliable, but as always, the best advice is to check with your notaire.