By now you should be running out of past papers to practise on. There are lots and lots of past paper questions in the ‘old material’ dropbox folder: bit.ly/Alevelphysicspapers
If you want more whole papers you could look at OCR’s old specification papers – the questions are very similar to your specification. The only thing you won’t see is the practical type questions.
Go to https://www.ocr.org.uk/qualifications/past-paper-finder/ and select Physics, AS and A level then ‘withdrawn qualifications, physics A’.