Spread betting on forex during voitile times

Does anybody have experience with a spread betting company who will fill orders in times of market volatility, I'm thinking in the seconds following a market moving announcement of some kind? The non farm is the most obvious example of it but I mean anytime where the market is moving very rapidly. I don't care if they up the spread by 2 or 3 pips at that time, I just want to get my order filled!

I've tried four myself now with no great results and chatting to others they've not had much luck either.