I celebrated a renewal of vows last year at a church near Heathrow. There was a reception afterwards at Cliveden. I can honestly say it was one of the loveliest settings for such a function. I�ve stayed at the hotel several times, but never held any personally arranged functions. So I can�t tell you about costs. But for a small intimate group, this may be an option to consider.
http://www.clivedenhouse.co.uk/
Others have seen me write about the Orient Express Pullman�s before. There are some lovely opportunities to take the train to a day destination, celebrate your marriage there, then return as a couple.
http://www.orient-express.com/web/bp/bp_a2a_ho me.jsp
And whilst I�ve never participated in one, I know of people who�ve celebrated their weddings on one of the Thames River Boats.
http://www.riverthames.co.uk/venues.php?cat=fl oating
I wish you a life of happiness
Fr Bill