Most professional sports events are still not operating as normal and some virtual cycling events are being held. However, changes are happening fast. For updates consult UCI or British Cycling webpages.
The local Viking Challenge is in October each year http://www.vikingchallenge.org.uk/
UCI for all the gen in the world of top class cycling; road, mountain bike, bmx, cyclo cross http://www.uci.ch/templates/UCI/UCI8/layout.asp?MenuId=MTYzMDQ&LangId=1
The local moutain bike race series FNSS. For details check out
Or find an organised ride that suits you - http://www.bike-events.co.uk/