The bike is back together and I have now done about 140miles so although I am reluctant to say it is OK, my confidence is gradually building. The oil leaks I had seem to be sorted though it is leaking around the plugs though it sounds like this is a common fault.
Many thanks to yourself and DJM for parts and help as it would not be going anywhere without it and to Brian, Al and other forum members for their support.
Here is a picture:

Still trying to decide about the exhausts, initially I did not like them but they have grown on me, they are certainly loud. I really enjoy riding the bike though I have not got a complete handle on how to start it (choke , throttle etc), forks do not feel great under braking and I am getting some fuel leaking from the filler (probably the 2nd hole I drilled), so as I guess with all old bikes, an ongoing project.
Greg