You must be a very miserable person based on your posts.
There is a new IT tool now in operation in case of cancellation or mass disruption which rebooks passengers automatically. A new permanent Disruption Team Manager has been set up for winter to deal with any potential cancellations and coordinate disruption handling. More winter deicing machines have been bought. Every department within British Airways has been trained or will be trained over coming weeks to handle new procedures set up in times of disruption. Staff at LHR equipped now with iPad Minis can retrieve booking and advise passengers where to go get a hotel, get rebooked, etc. IT system has been updated to send passengers email and text the moment flight is cancelled, it has not been the case in the past or was inconsistent.
Few days ago LHR suffered from heavy fog resulting in 30 cancellations and thousands of MICs. System worked brilliantly.