Detailed knowledge of UK slander/libel laws in regards to content?

I've got quite a complicated question to ask you guys and I'm not expecting people here will know but it might be worth a shot. I've got a game planned that could land me in legal trouble depending on how it's interpreted and given the group of people in question that I intend to mock I need to find out for sure not whether or not what I'm doing is legal ( because I know in general it should be ) but whether or not somebody could sue me over it. The reason being is because I think the defamation laws are quite different here in the UK compared to other countries ( Yet another reason to leave this shit hole ) so I don't know what lines I can cross as much and what I can't.

It doesn't involve anything like defamation which definitely would be illegal, but it certainly takes the piss in the same way South Park or Family Guy does by mocking public figures so I'm wondering if anybody could give me information on this I'd appreciate it, it's a very very specialised area of the law though it seems.