Apart from bringing 757 and 767 flying in-house what would globespan bring to BD? Sure, they have a fleet of 737s, many of which are NGs, and a nice Scottish base of bucket & spade routes which the 738s would service fine and help WW to expand. There is no overlap in the markets either and the WW brand would be somewhat known in Scotland.
Thinking about it, actually it makes a wee bit more sense. BD is pretty constrained in LHR in terms of slots and suitable aircraft. Globespan would bring aircraft to the table and although the entire portfolio does not fit in one BD airline the 737ops would match well with WW and the 757/767 would be good in LHR. I dont think the long-haul routes are BD's cup of tea though, pickings are richer down in London.
Brian.