The boss of G4S Nick Buckles is appearing before MPs on the Home Affairs committee to explain how his company failed to fulfill on its contract to provide thousands of staff to secure the Olympic Games, due to start in 10 days time.
Buckles - whose job is on the line after G4S found it had a gap of more than three thousand Olympics security staff - will have to account for why so many staff have simply failed to turn up, causing the Army to be deployed to plug the gap.
The Home Secretary Theresa May had to appear before the Commons on Monday to explain why the government had not been told of the looming staff crisis, amid allegations that ministers in the Home Office had become aware of a possible problem as long as three months ago.
Live updates of the key points of Buckles' evidence will appear here.