Adam,
I'm sorry, I misunderstood you. I thought you had already flown your first solo, because you wrote you were doing circuit-bashing now. For me the circuit-bashing came after the first solo, and I thought this was the same for PPL training in the UK.
Anyway, don't worry about the hours. As I know from my fellow students and myself, it very often takes just a single lesson to learn something you have been struggling with for a long time before. So, most likely your first solo will happen sooner than you think, maybe after your next flight.
Best of luck.
hvogt