Mallory Park. (Leicester)

I’ve heard that there is a night time cycling ride at Mallory Park (Leicester) on a week night over the winter? where two groups (a fast & and a slow one) ride round the track. Which day am not sure.

Any one here know what am on about?

I would like to have a go and join in! Can anyone point me in the direction and let me know who, or which club runs it?

Cheers.