Both departing and arriving services were impacted and according to data analytics firm Cirium, the carrier cancelled 43 flights as of 5pm Thursday (25 May) – equating to 5% of all services to and from the London hub.
A spokesperson for BA said affected customers were contacted and offered options, including a refund or rebooking to an alternative flight with BA or another carrier.
"While the majority of our flights have continued to operate, we had to cancel a number of Heathrow flights due to a technical issue," they said. "We are extremely sorry to our customers for the inconvenience caused."
