Just found another excellent video of how bad some people were on this track day, ....ok really I'm only posting it because at 4 minutes 34 seconds my Zed makes an appearance.
I think it's a funny video though because this guy seems to be working overtime just to keep the car on track were as I was so calm in side my car trying to keep nice smooth racing lines/braking points.
Also it does show that Castle Combe did black flag some people at least.