First "But"
In Wales there is the option for Organisers who are already registered to Welsh Athletics to register the race with them.
The WFRA don't have a monopoly on officially sanctioned fell races.
Second "But" is that yes they have an option to add a surcharge to WFRA events for non WFRA runners. I'm not sure if that race is then "under UKA Rules". It could be, but it could be separate from them.
Third - I know Ba-Ba understands it to be optional. I understand that isn't the case but I could be proven wrong in due course.