Thanks for that Doug,
The handbook does point out that the engine can be tappety, from cold after a few days as the oil drains away. On start up mine has quietened down even after a few days left standing, but it 's still noisy when warm....so from discussion I had with Mat at Lifes, they may have to be adjusted. What makes it sound worse is the complete lack of any sound deadening, which you get in normal cars.
I'll let you know how things turn out.