Heathrow on Tuesday (12 July) told airlines in an open letter it was capping capacity until 11 September with immediate effect, and urged carriers to stop selling new tickets for the summer admitting it could not currently cope with any more passengers.
"New colleagues are learning fast but are not yet up to full speed," said Heathrow chief executive John Holland-Kaye. "There are some critical functions which are still significantly under-resourced."