Little Bro' has a 2.5l 1998 diesel Ford tranny, non turbo, pre common rail, obviously. Its a horsebox, so is rarely used, 200-300 miles a year max, as its really only for taking the horses to the vets, although it sees more use transporting large items around the TB family

Anyways, this time of year, its a pig to start, often not able to at all. Spins over fine, but no firing. If/when it does, it chugs until to fires and runs properly.
My immediate thought is glow plugs, or water in the filter (he hasn't checked this yet). He says he can't see any glow plugs in the head

. He has never seen a glow plug light on dash.
Anyone know if it does have glow plugs?
An additional problem, during oil change, he is seeing a fair amount of metal filings. He's not had chance to remove sump to see whats in there. Could this be a symptom of so little use? Or something far more sinister? He's never adjusted tappets on it, that is unlikely to cause this?