Racing up
Age Classes and Ability Classes
A special condition applies if a paddler could theoretically enter Ability Classes and Age Classes in a Regatta. An example would be an Under 23 paddler wanting to race in both U23 events and Ability Classes.
For K1/C1 races, paddlers can only enter an Ability Class or an Age Class. They can't mix and match. Whatever the decision the K1/C1 entries have to be consistently either Age Classes or Ability Classes for the whole regatta. This restriction doesn't, however, apply to K2/K4's crew boats.
Events comprising Age Classes and Ability Classes
If an Event comprises both Ability Classes and Age Classes, e.g. Mens A & B + Mens U23, and a paddler is eligible to enter in both the Ability Classes and Age Class, for an entry to be recognised for that paddler they need to be entered both the Ability Class and Age Class.
https://canoesprint.britishcanoeing.org.uk/admin/events/checkup/4