Quote: "They could have used 757s to combine flights, if they still had them, so what happens when the 767s go?? Cant imagine BA using 777s on short haul flights to cope with snow cancellations."
Why not, provided the destination airport can handle these, why not use any available large aircraft to clear the backlog. As they say: "any port in a storm".
Quote: "Isnt the problem with BA and Heathrow in general the fact they operate too many flights? BA fly to Berlin Tegal 6 times per day, they fly to Milan MXP/LIN 9 times per day. Im sure some of those flights are far from full. Surely to avoid snow cancellations and to free up slots at LHR they can operate less flights but with larger aircraft?? Maybe 321s instead of 319s on some flights?"
Not neccessarily, business demands high frequencies for the flexibility that they need. Moreover, some frequencies may be timed to allow transfers to longhaul flights, the "hub" function.
No disrespect, but the chances are, as mentioned by Tableview, that BA know what they're doing!