The oil was leaking from the front part of the rocker box face on the left side and also on the right side, today I removed the rocker box, cleaned the sealing face and set to with the pane of glass and grit paper, cleaned the head sealing face, annealed the copper gasket, then using clear silicone fitted the gaskets to the head, I then used a different silicone that is used to replace gaskets, cork and the like, on the rocker box face and have left this to cure. My thinking is that when I bolt the two together it will squash down and form a good seal.
I will find out later in the week