You are right John, the Dominie is based on the Hawker Siddeley 125 business twin-jet. Based at Cranwell the RAF use them "to train weapon systems officers and operators, air engineers and air loadmasters in systems management, air leadership, decision making and teamwork."
That shot was 'snatched' as I left the area, I had stopped to pass through a farmers gate, and just had time to grab the camera and wave it in the general direction of the plane, all over in a few seconds..........where have I heard that before :-)