Thankyou for that. If I can find egr il dissabled it. There a problem waiting to happen from experience. The following msg I'd wrote out before I seen your reply.

So today wen about cleaning the micro in pump filter. That wasn't actually there when I took the banjo bolt out. So that was ruled out. When I looked down to the pump for the banjo I notice what I would describe as a shiny piece of micro bore steel sticking out the back of the pump. Very out of place as everything else was pitted with oily dirt. Anyway pushed pump primer and heard diesel splashing on floor. On further inspection that pipe should of had what I guess Is a fuel return or overflow pipe attached which had popped off. So I reconnected it. Went for a drive and problem seems cured? Could that pipe of popped off yesterday and caused my origonal problem?

I'm not yet jumping for joy as I had to disconnect the battery for access so thinking that may of temporarily reset the ecu into running right but I guess il no by the end of the day?