So after opening my eyes
I realised I was wrong, the pipe going round is 15mm the clips have snapped so it's hanging down, I've read it's not ment to touch the wall?
Anyway the 8mm pipe still comes from the fire along the wall inside through the back wall and along the outside wall for about 1 mtr, in total I'd say just under 3mtrs of 8mm used. I think I will get the 15mm extended inside and get a shut off valve that goes form 15 to 8mm put on aswell?