So - I moved to Poole/Bournemouth to take my Masters, and hence I have the wonderful opportunity to get into some cyclocross, since it practically does not exist in Norway.
Though - where do I find events?
If you Google 'British Cycling' and 'cyclo-cross' you should get all the stuff you need
Primera Sport in Charminster Road might be able to give you some pointers as well as they deal with bikes, sportives, etc and have a lot of local knowledge as a result.
Wessex League is the local CX league, but the Poole Race is the only one in Dorset, you have to travel a bit for the others