Got back after three months and car (1996 Defender 90 CSW) starts first turn of the key.
Bloody peculiar and expensive sounding noise comes out of engine compartment when moving.
Phoned mechanic, who says it sounds like a universal joint at the engine end.
Mechanic turns up on his way home and listens to the noise... "It's not a UJ, pop the bonnet."
Looks inside, "The fan bearing has gone, completely gone, never seen one as bad as this before, I'll be down tomorrow morning (Sunday, which is nice of him) and fix it, only a few minute job."