Some airports like Heathrow have a "westerly preference", Manchester has a preference to 23L/R where even if there is an easterly wind but it's less than 5 knots they'll still use the preferential runway(s).
I think Birmingham has a preference to 33 as well. Don't know in any of you have ever heard BHX ATIS message: "Preferential use of runway 33 is in operation. Landing aircraft requiring runway 15 must state that it is for operational reasons", often when it's a light south/easterly breeze (it avoids landing a/c flying over Birmingham for 15 when the wind is only fairly light).
As far as I am aware Stansted doesn't have a preference to runway 22 (albeit it is used 65% of the time due to prevailing wind direction). If the wind is to go generally easterly regardless of strength, they'll generally switch to 04. Or they tend to keep it on 04 unless the wind starts to favour 22, where as some airports like Manchester will switch back to 23L/R really as soon as they can for preferential reasons.