British Airways is cancelling more flights scheduled for the summer holiday season, it said on Tuesday, at a time of widespread disruption at airports caused by staff shortages and a surge in travel demand.

The airline said it would now reduce its April-October schedule by 11%, having said in May the cuts would amount to 10%.

"As the entire aviation industry continues to face into the most challenging period in its history, regrettably it has become necessary to make some further reductions," a British Airways spokesperson said via email.

"We're in touch with customers to apologise and offer to rebook them or issue a full refund." (Reporting by Sachin Ravikumar; editing by WIlliam James)