There was a very good revision website called 'SAM Learning' (this was 8 years ago but it might still be around) which had some very useful stuff relevant to the novel we studied. Literally no idea how I got an A* as I've never been an avid reader, but it's more about your essay writing technique and including 'originality' in the exam answers (not many English teachers tell students this, but that's how you get an A* provided you meet all the other criteria).
This was like half a decade ago... I didn't really 'revise' for GCSEs, I just handed work in on time and did all my homework. I vaguely remember doing a lot of past papers though especially for Triple Science and Maths and writing out model answers for questions. The whole exam syllabus may have changed now but that's how it was when I did it.