What happened
The incident involved two RAF Oxford twin-engine training aircraft operating out of RAF Swanton Morley. Both planes were on a training exercise and had recently departed the airbase. Each aircraft was carrying a crew of two, resulting in a total of four personnel aboard.
During their flight, the two aircraft collided in mid-air. The specific circumstances leading to the collision remain unknown. Following the impact, both airplanes lost control and dived into the ground. The force of the crash destroyed both airframes completely.
Findings
All four crew members on board the two aircraft were killed in the accident. The fatalities included the pilots from both planes. No survivors were reported from either machine.