Thanks for the info. I ended up buying a new set of contact breakers on-line from The Green Spark plug Co. They arrived the following day and are now fitted. The bike now starts easily and runs much better!!
Thanks Phil, I will give him a ring.
Just to let you know that I posted the Dowty forks tool today so you should receive it within the next few days.
All the best,
I made the tool you need when I rebuilt my Dowty forks, would you like me to send it to you?