CAA Guide in respect of SPIC states:
"Student Pilot In Command. (Pilot acting as pilot in command during a recognised course of training, under the supervision of a flight instructor. The flight instructor shall only observe the student acting as pilot in command and shall not influence or control the flight of the aircraft" Enter time in P1 column
The definition in respect of P/UT is:
"Pilot under instruction for the purpose of gaining a licence or rating, or for conversion to an aircraft type withing an aircraft rating group or class" Enter time in Dual column.
Don't know whether this helps anyone - it may only serve to confuse the issue even more in respect of the original question asked many postings ago!!