At the air show on a Sunday, one of the displays was a Vulcan (Number forgotten) flying in from right to left, low across the airfield. In front of the crowd, approximately in the centre of the crow, the Vulcan shot up vertically and with a roar from its engines disappeared into the cloud cover. There was a gasp from the crowd followed by tremendous applause. It was then announced over the public address that the Vulcan was being used as a test bed for the Concorde engine. What a sight! What and aircraft!