Not sure where else to put this thread. The volume of BA flights from LHR probably makes this the least worst place.
We have narrowly dodged this bullet, in that (HAL strike permitting) we are due to fly on 5 Aug. But if one had to travel west to be at LHR before about 1pm on Sunday, then the road and bridge closures make that look tricky (details here:
https://www.prudentialridelondon.co....road-closures/ and pages linked off that page).
Plan ahead!