Thanks for the replys guys,My grandfather lived all his life in the uk spending 50 years working for Napier & sons engine works.the bike is a lot earlyier than i thought.
I also looked at the bike suggested and it is pretty close to same,my chances of finding another is pretty non existent if they are that rare.Have attached another pic with him sitting on it for you to look at,i will also put other bike in real soon to identify.
Thanks for everything
Mark