This was advertised on Knockhill's website for ages, then on BTCC web site as well as advertised on local media ie radio and paper. Never managed to go myself as they thought it would be a good idea to make it through the day when most sane normal people were working. A few years back they had it at 6pm, this was before I was into photography IIRC as I cant find pics of it, and it was a very good event to go to.