Prophead
Your location says Berkshire not LBA or Yorkshire hence my belief you live in the SE, unless you commute like I used to do. As for the use of a 3rd runway stopping the MAN bus service, dream on. It is BA who run the service and I have no doubt 3rd runway or not I would be on a bus if I returned to using BA and LHR. I would be back on that bus again within 6 months with the optional delv of my bags outbound, or inbound. Its funny I started to leave LHR and BA in around 2007 apart from the odd flight. Now despite numerous flights , gales , storms, volcanoes, Fog EK /SQ/LH have got me home, or outbound with my luggage at the same time, to the same place, a point that BA and LHR failed to do on numerous occasions hence my move. As for spending money at LHR I have to ask why. The place functions badly now so here is a radicle thought, cut the number of services but get it right for those that remain, and this applies to both BA and LHR and then rebuild your airline and airport rather than this dash for growth which is proving so trouble some.
Regards
Mr Mac