Another poster on another thread (about a BA flight returning to Berlin on Sunday) has pointed out that in his case there were problems with T2 and Eurowings.
TBH Simon Calder is sort of stating the obvious - if for whatever reason there is a major problem at LHR then it’s a given that BA will be the most effected and chances are T5 won’t be a pretty sight....In any event I’d be interested to see the stats for Sunday for all operators at the airport.
BTW the last time I operated out of LHR with BA in significant snow a few years back we got away OK, albeit about 2 hours late. The last time I actually ended up cancelling and night stopping due to snow was out of a US eastern seaboard airport......not that that is evidence of anything other than there is a danger of making the assumption (happily fuelled by the media) that it is only ever LHR/UK that cannot cope with “bad” weather.....