Last night on Sky news (in the section where they discuss the next days newspapers) there was an article about tax for British Expats being changed to the U.S system
The article did state that it wouldn't happen "for a while", but that it would happen. Unfortunately, I have searched Sky news/Google News/Expat Telegraph etc and I cannot find mention of this news item to reference it for you all-hopefully Helen will be along with more information at some point.
Thought this might be useful for all the Re-pats moving back with their Brit spouses to keep an eye on.
Sheril