Thank you both guys, I will print that off.
I don't have the silver connection with the 2 small holes which goes onto the white valve when filling. So I wasn't too sure what it was like before I saw the picture. I guess I will be able to push the pin on the white valve down with an implement to let the air out as I am filling the tank and let it up as soon as it changes to liquid gas?
I am just cleaning up the base etc and touching up some of the green before I run the engine. I don't know the exact green colour so I will blend a small amount to match. The original certificate was fixed under the small wooden platform. It says P512 Don 28/2/11.
Regards Brian