And just as a small commment on the side.
I'm not sure that people realise how spoiled they are with circuits in this country. Considering the size of the UK, we are absolutely RAMMED with great tracks, and always have a great choice each year.
As an example, if you race in America, the geography of the place (It's huge) often dictates that you race with a single club, usually with no more than 3 tracks to choose from (unles you do AMA). I raced at Willow Springs, and their championship is held at one track...you guessed it...Willow Springs.
We are REALLY lucky.