I was lucky in that our teacher essentially compiled loads of scenarios for us into one book, but look at AQA and old OCR spec papers too! We're only the second year of exams in the current OCR H418 spec, but the old spec is basically the same just with more content within it e.g. public nuisance, more evaluations, etc. but you can just ignore those
The scenarios are the same as they cover the same basic content, and it at least gets you practising picking apart questions. I tend to plan questions more than actually writing out full past papers, just practising unpicking the scenarios and I'll quite often do the law itself in bullet points then the actual application to the scenario in more detail.