Ryanair chief David O'Brien on 'a difficult summer'

The chief commercial officer of Ryanair said it has been "a difficult summer" for the low-cost carrier.

Passengers, many travelling through London Stansted Airport, have been left frustrated by delays and cancellations but David O'Brien said: "I'm happy we've done everything we could".

On Thursday the carrier announced a $200m (£156m) investment in London Luton Airport.