The CAA PPL has been a JAA PPL since c. 2000 and the JAA documents are
here. I am not sure if the syllabus is published as a straight document but it jolly well should be (like the FAA one is).
The PPL Confuser doesn't, as far as I recall, contain any exact copies of real exam questions. However, so many people have sat those exams over the years that it's a piece of cake to put together examples of the questions.
The Confuser gets criticised by the god-appointed puritan guardians of all things pure but has about 4x more questions per subject than the exam paper and if you get a pass mark in it then you must have acquired a reasonable understanding of the subject.
The FAA question bank is published and now also the JAA ATPL question bank is published (initially in German only and now you can get it in English too). Perhaps the JAA PPL question bank is also published but maybe the questions are still set by the UK CAA?
One needs the Trevor Thom books because the PPL exams are often word plays which rely on you having read the right books.