Airspeed built the Ambassador at Christchurch, Hampshire, a wartime second location for them compared to their traditional home base in Portsmouth. They had built thousands of Consul twin-engined trainers/light transports for the RAF in the war.
The only significant order was for 20 from BEA, there were just a couple of oddball others. After BEA withdrew them they found a niche with independents - BKS, Autair, Dan-Air, Globe Air Switzerland, etc. Three were sold to Butler in Australia and actually delivered but something went wrong contractually and they were flown back to Britain again. It was a good, pressurized, 5-seats-across aircraft for the secondhand market in the 1950s, but presumably became difficult to support.