Am I allowed to do Class 1 practical BEFORE CPC (Class 2)?

UPDATE:

Passed my CPC earlier this year. I’ve also done my Class 1 training but unfortunately failed the test (it was due to one signalling mistake, which isn’t bad compared to hitting kerbs which was what I was mainly concerned about)

… still waiting for a re-test but I guess this “back-log” is delaying everything right now … would be nice if my trainer company replied to my emails though. :frowning: