Thanks to the rank incompetence of the UK’s so-called ‘government’, Devon is now effectively back in lockdown with classes suspended in Tier 3 until further notice. Meanwhile try to stay safe.
The relevant part of the government guidelines (cutting through the obfuscation, confusion and civil-service double-speak) comes down to this:
In tier 3 areas: people should not take part in any indoor sport or physical activity with people from outside their household. This includes indoor team and individual sports, training sessions and exercise classes. Personal training is permitted for 1:1 sessions only, and should not take place in private houses. Gyms and sport facilities will remain open, but group activities are not permitted (unless the group consists of a single household or bubble). Contact combat sports are not permitted.
Not much more to add.