Boris Johnson previously said the chances of leaving without a deal were "a million to one".
Boris Johnson and US President Donald Trump talk Brexit over breakfast during the G7 summit.
Customers say they are unable to get in touch with BA, as the airline says it is fielding 40,000 calls.
The pilot and passenger died when the small bi-plane crashed in a field near Henley-on-Thames.
Ryan Murphy, 19, from Cookstown, was following Rory McIlroy at a US competition when he was hit by lightning.