To put us all out of our misery I called they guy up. He sounds as straight-up as you could get.
Said it was an import, then exported to middle-east with 0 km on, then re-imported and returned to road legal.
Confirmed the engine & frame numbers, welcomed visitors, and was definite that it'd never been down on either side.
Which makes it something of a bargain assuming it's mechanically sound. Cheapest I can find elsewhere is £6.3k.
Good luck.
Ali