Nigel
I suppose the unknown at least to the public is to what extent EMA traffic is just pulling traffic that would use BHX anyway, if you live south of EMA then i guess BHX is no big deal or if you live North then DSA might be a consideration, but you would put the Derby/Nottingham catchment area at risk of using one of the other EMA based operators.
Personally i can't see them pulling the plug on EMA, Leeds on the other hand must be a uphill battle against FR & Jet2, but they face the same at EMA so who knows? perhaps DSA might give them an easier slice of the cake.