You could try Coventry track (based by Baggington Airport)
They have a winter series, being held in conjuntion with Kidderminster. Coventry meetings will be on the 4th Sunday of each month.
Have a look on
www.onetenthoffroad.co.uk , the full list of Winter Dates are on there.
Alternatively, you could try Worksop. Although I'm not sure what meetings (if any) they're running at the moment.