Landing at Compton on Saturday it was surprising how many people (it was heaving) kept announcing that they were on final, then short final, then very short final. Each time the A/G operator gave them (correctly) the wind direction and speed, adding the information that they were an Air/Ground service. The airwaves were also pretty full of people asking for taxi instructions, and calling ready for departure at the hold, expecting to be cleared for take-off.
Don't get me wrong, this is not a general moan about the quality of RT, but some of the people suffering from a lack of understanding were (correctly) using the Student prefix. In my opinion the fault lies with their instructors who should know better, and who should have ensured that their students understand the different services available, particularly as they're supposedly under supervison.
CAP413 has the details.