A British Airways Concorde is making a supersonic test flight from Heathrow to Ireland.
The plane will be flown to Shannon airport where it will be used to give flight crew refresher training.
The training will include up to 35 take-offs and landings.
The jet will be under the command of BA's chief Concorde pilot Captain Mike Bannister for the 90-minute journey.
This is the third Concorde test flight ahead of its expected return to passenger service next month following the Air France crash last summer which claimed 113 lives.