I can't believe this! At Gatwick, we've upgraded Club to First, WT+ to Club and WT to WT+ to accommodate as many stranded LHR pax as possible. Where practical, the pax from LHR who had a sorry tale were put in WT+. Whilst it is the airline's policy to only upgrade one class, by playing it like a game of chess (moving Prems/Golds/Silvers etc first), it is possible to use 100% of the available seating whilst still adhering to corporate policy! I firmly believe Heathrow "closeout" staff would do the same.
Unfortunately, whenever BA has any form of trouble, the press are only to keen to find other angles with which to discredit our poor, battered company!!!
Cheers
BEA