Mate came good.
We used a milling machine to drill the heads off the bolts, once off you could get the bottom section out with your fingers. Not a scratch on the spider.
Bike now back together and pining to get out tomorrow to try out extra travel and girt big rotor.
BTW, bike shop say Hope keep all their programmes for the machine tools so they can produce any spares, even discontinued ones. They could have knocked one out, on request, for about £20. Worth keeping that in mind.