Right, all the info can be found at
www.brca.org (ill get the cheque at the weekend paul

)
The brca site will tell you how to join the BRCA, what the BRCA do and it also has a section for the Electric board (EB). This is where you will find out what batteries and motors are currently legal.
Regarding entering meetings the BRCA site will give you details on entering the national series.
oOple is a good source for information also on entering other meetings that are not affiliated with the brca.
Personally if i were you, i would just get ou there and race, you will learn so much more and quicker than you would just driving round cones in a carpark, Its more fun too