Look up Sky Learner Aviation online PPL theory course.
That's what I'm using to learn right now - then just book the exams through the ATO you end up with. Through my experience so far, I don't think you should need any F2F tuition. None of it seems to be particularly difficult and as mentioned in previous replies, resort you YouTube if there's anything you don't understand and isn't explained well enough for you through the online platform.
Costs £39 p/month + then exam costs so works out economically quite well I think.