So the roll cage has turned up, big thanks to my Little Bro Tom for picking it up. So problem 1 is the fact that although I was told by the Seller that it was a Safety Devices cage they tell me it isn’t according to SD despite having the stickers!
So the ‘Go Racing Pack’ has arrived, the Blue Book is indeed useful and it seems the cage is legal so thats a start but looks like I will have to fabricate my own spreader plates for the cage.