So after some reading, I decided to go for the Cobra Monaco Pro bucket seat and the JB Side Mounts.
Was looking about on the GSM site and came across a good deal. I already had in my basket the Cobra Monaco Pro in Black Vinyl, I then went to add a harness and found the TRS Magnum Harness. Total for both items was £456 in VAT.
I then looked at the motorsport packages and seen I could get the exact same seat and the same harness for £348 if purchased together. Not a bad £120 saving.