The GLA-LGW sectors with BA are subject to delay in what I would describe as a frequent basis. Used to use BA a lot on routing to GIB from GLA with a fairly tight connection - that quite frankly if I made it - my baggage did not. Solution? I just gave up and starting using FlyGlobespan with my car being left - free of charge I may add currently at Malaga. never a problem so far with GSM!
Nivsy