Hi All, thanks for all of the responses. Seems to be a lot of confusion regarding the roll bar requirements. It does however appear that the rules did change in the last year or so and the Caterham track day rollbar is sufficient for the vast majority of LoT tracks, including Silverstone. I've also looked through their facebook page and seen a few caterhams with just the trackday bar at Silverstone in November- https://www.facebook.com/LotusOnTrack/photos/a.5716118661834671/5716044388508765 I have therefore joined LoT and booked Silverstone for the 13th March with an instruction session. Hopefully I'll see some of you there. Best wishes, Ben.