The following text from Aviation Week is not unique to the aircraft pictured:
03/13/1961. Flight development program of the 748 feeder liner was set back four to six months by the extensive fire at Avro's Manchester factory when the roof collapsed on the second prototype.
09/17/1962. Nine Avro 748s were grounded after two in-flight incidents following loss of main entry door. In one case, a stewardess was sucked from the plane at 9,000 ft (2,743 m).