Sadly the great British public will not support your strike action if it was to go ahead. Nurses and other low paid professionals will always get the sympathy vote. Notice how support for fireman and even the police is sadly lacking. Times have changed and the majority of the public aren't in unions nor do they have the support of the public sector and so having experienced or about to experience changes in their own circumstances won't be too happif if again their two weeks in the sun is disrupted.
The city gent will simply postpone or most likely re-book with an alternative carrier. As for the regions well don't worry as the first flight BA cancel is the MAN shuttle so landing back into LHR and being told your on your own yet again is the Managements way of harming things