After the torrential rain yesterday and spending a night on the trailer mine wasn't happy. It would start and idle no problem but would then die as soon as the throttle was opened. After disconnecting all the electrical plugs and trying to dry everything out it still wasn't happy.
As suspected the throttle position sensor wasn't registering in the ECU as soon as I re-calibrated it by hooking it up to the laptop, everything is good and it picks up no problem. Will give Emerald a call tomorrow to see if this is a known problem, though I suspect it was water ingress somewhere.
A big thanks to all those that helped organise the weekend.

Dave