I qoute " Although the Tornado could match Concordes cruising speed, it could only do so for a matter of minutes due to the enormous rate of fuel consumption. Several attempts were made to get the shot , eventually Concorde slowed down from Mach2 to Mach1.5-1.6 so the Tornado crew could take the shot.The Tornado had been completely stripped of everything non essential to enable it to get up to speed for as long as possible." Adrian Meredith [ Pilot]