The indy circuit is fantastic! The same track that is used for timeattack and countless other series. Great to watch and to drive in some ways a better track than the GP as it doesn't have as many long straights.
95% of trackdays at Brands are the Indy circuit though... the GP one is only open to the public a few times a year and is about £400!
I would have loved to come along to this as I've been meaning to do a Brands trackday before the end of the year, but what with a CAT DT day at Millbrook this weekend, the 'Ring next month and my new set of TE37s that need tyres, I'm out of money! Hope you have fun though Sam!