According to our local news, all four crew members escaped unhurt. Apparently, one engine caught fire so they elected to make an emergency landing at the Marines Base at Poole. Just before they landed (300') the second engine exploded, according to the report. The aircraft is totally destroyed by fire.
My No 2 Micropulse was swimming nearby and saw it descending with smoke from one engine. He also heard the explosion and saw a lot of smoke.
CG are threatening to move this aircraft from Portland to Leigh on Solent so this might accelerate this move, which will upset a lot of locals.