Oxford PAT - how do i prepare?

I sat the NSAA (now ESAT) for NatSci at Cambridge - the best way to prepare is to make sure your A-level content knowledge is super sound, know it back to front as most of the question stem directly from there. I did lots of timed practice papers and then marked them and went through any questions I didn't understand. I'd also recommend having a few infrequent sessions with an Oxbridge specific tutor, come prepared with any questions and then ask them to recommend you work to do in your spare time, can be super helpful. Can recommend a reliable Oxbridge specific agency too.