Thanks to all three of you, especially Dave who even rang me.

Update so far is it definitely DOES have an in tank pump which appears to be dead and I'm hoping for one later today (dealer only £295 plus VAT).

I'm not totally convinced that's all it needs as I rigged up my own (Heath Robinson!) LP pump and it ran about 3 times for about 10 secs then wouldn't restart again.

We'll see. I'll keep you informed.

Colin