Sorry, I can't help, I do work at FF, but am a loley trainee, and would be very embarrassed if any information I gave out later turned out to be incorrect.
If you have a genuine question, get your flying instructor to ring the tower and clarify to procedures.
As a side non Cardiff specific, I would never enter CAS without having a full and formal clearance, e.g. GABCD cld to enter blah blah .