Thanks for the reply, it appears to be coming from the middle of the back end of the engine but because of the bulkhead you can't really see down the back end
I have a Disco2 Td5 with various issues worst one being:- steam coming from upper rear of engine but unable to see exactly where from. Doesn't look like either of the hoses which cross the back of the engine and the coolant only goes down by a small amount is this likely to be the head gasket...