Jon01 - I assume you mean lack of CAR parking. Ha ha ha ha.
I think the problems are a bit more widespread than you suggest, ie no planning permission and a planning authority that doesnt like airports!
Quite a difference, is there not, between landing a 757 diverting on a specific one off ocassion, (when wind rain temp conditions are known), and routinely scheduling it throughout the season, when much more adverse conditions are bound to apply at some point. The previous appearance of the 757 did not include a takeoff with a full payload of passengers and fuel to get to europe did it? More like a quick hop more or less empty to BHX