If you will be in the Leicester area, be sure to check out the Mid East clubs too -
www.me-or.com.
We have some good Astro and Grass racing throughout the Summer season. Great indoor racing at Broxtowe and West Bridgeford (both of which are 30 mins from Leicester) thru the winter too
There is also Silverstone club, Moto arena (both in the Silverstone area) and Ardent raceway (near East Mids airport) to consider.
HTH