https://www.theregister.co.uk/2019/08/07/it_issues_causing_delay_for_british_airways_passengers_again/

It's not the summer holidays without an IT cock-up causing a major delay at UK airports, once again courtesy of British Airways.

Folk travelling with the airline are having problems checking in online at London's lynchpin airports, which is affecting travel across the UK, including shorthaul flights to other UK airports.