Heathrow was working with the airline to get delayed bags to passengers "as soon as possible", the airport said on Twitter.

"Our IT systems are now back up and running and we will be operating a full flight schedule at Heathrow and Gatwick on Tuesday 30 May," BA said on its website. (http://bit.ly/2r5d38i)

BA had been forced to cancel all its flights from Heathrow, Europe's busiest airport, and Gatwick on Saturday after a power supply problem disrupted its operations worldwide and also hit its call centres and website.

(Reporting by Ismail Shakil in Bengaluru; Editing by Dan Grebler)