No idea, but it had been on the ground for a number of years. Don't think it had flown since the late 90's. It had certainly flown a few hours - close to 40,000 I think- my dad mentioned it had already clocked up a fair few hours back in the mid-80's when he worked at BAH.
When I took the picture above, last year, the airframe was virtually stripped, although the cockpit and forward avionics bay was fairly complete. Did wonder if it was being kept for a 'rainy day'.