British Airways, owned by IAG, was forced to cancel 43 flights on Thursday due to IT problems, writes the BBC. 

The flights were scheduled to depart from Heathrow Airport. According to the company, there were technical problems with online check-in. 

This is not the first time in recent years that British Airways has been forced to cancel flights. During the Easter weekend, around 300 departures had to be cancelled due to strikes. In December last year, it also had IT problems that caused delays.

Source: FinWire-DI.SE