American, which replaced its top operations executive last month, says its aging fleet has led to increased cancellations because of more mechanical breakdowns.

WSJ: The Leader in Lost Bags, Canceled Flights

The AA had gone to more than 11, 000 breakdowns by 1730 GMT, with calls peaking at 1, 200 every hour - about twice the normal rate.

BBC: Heavy snow and ice bring travel chaos across UK

The AA had attended 7, 700 breakdowns by 1100 on Tuesday, having dealt with 24, 000 the previous day - more than twice the norm.

BBC: Fresh snow brings school closures