The first two Vulcans, commanded by Squadron Leader John Reeve, and Flight Lieutenant Martin Withers, left Waddington at 0900Z on 29 April and arrived at Wideawake at 1800Z after a non-stop nine-hour flight during which they were twice refuelled by Victor tankers. Two other Vulcans subsequently deployed to Wideawake: one commanded by Squadron Leader Alastair Montgomery arrived on 14 May, and another, commanded by Squadron Leader Neil McDougall, on 27 May. It carried out trials with the Martel anti-radar missile before being equipped with the Shrike missile.