The Times (UK) had an article today that British Airlines pilots have voted to strike, beginning as soon as August 6.
In addition, "It may coincide with a series of strikes at Heathrow by Unite union members over a pay dispute for 4,000 workers including security guards, engineers and passenger service staff. Easyjet staff at Stansted are expected to walk out in a separate dispute, while workers at Gatwick are balloting for industrial action. Ryanair pilots are due to ballot on strike action this week. The Heathrow Unite workers’ strikes will take place on Friday and Saturday, a week after the start of the school holidays. More strikes will be held on August 5, 6, 23 and 24."
My deepest sympathies to anyone traveling to or through the UK in August. Unless these strikes are settled, it's likely to be a mess.