Thanks gottcha Jay, no the car won't be tracked(at most maybe a parade lap at Combe) so not going to be given full stick. I've already got a daily driver so this would be a simple casual summer car.... I'm too old for hard driving, and the car would be restored. Still a small cage would be ok, even though i didnt really want one in there. However Phil did recommend one as people above.
I do like the safety devices ones and Dans.
Link to where his came from if anyone needs one in the future
http://www.rollcentre.com/rollcages