On 8 July 2010 an Easyjet Airbus A319 on which line training was being conducted mis-set a descent level despite correctly reading it back and, after subsequently failing to notice an ATC re-iteration of the same cleared level, continued descent to 1000 feet below it in day VMC and into conflict with crossing traffic at that level, a Boeing 737. The 737 received and actioned a TCAS RA CLIMB’ and the A319, which received on a TCAS TA, was given an emergency turn by ATC. The recorded CPA was 2.2 nm and 125 feet.