http://www.chessbase.com/newsdetail.asp?newsid=7903
The first paragraph :-
It wasn't one of the better known ones and the article is careful to say a not the. Does anyone recall where and when? It would have been mid nineties presumably.It was the closing dinner of the London Chess Classic 2011, where it is tradition for the tournament GMs to play a sequential simul against the individual tables. At one there was the Shadow Secretary to the Treasury Rachel Reeves, together with other notables. With some minimum assistance Rachel found a nice bishop sac to win the game. No wonder: she was a UK U14 girls champion.