Delta Bomber Flies Over Air Show -- There she goes - the Avro A69 the world's first four-jet delta-shaped flying triangle-range bomber. This impressive picture was taken as the aircraft flew over the Farnborough air display to-day. The ban on faster-than-sound flying by British ace test pilots, imposed yesterday, was lifted to-day - but only for to-day. The Delta bomber was to have appeared at the Society of British Aircraft Constructors' show yesterday, but was prevented from doing so because o