I think maybe the Taxi driver did it and got his son to film. When the son and Tom left the vicars and Tom immediately got his phone out to look at some more porn 🙄 the step son looked really worried and uncomfortable.
I guess it could just be because they had just been in major trouble for sharing porn and now they were looking at more. But maybe the son knows he has been filming stuff for the dad and is worried that footage of Trish's rape is going to appear. Whereas Tom would have no such worries as he isn't involved in the rape, he just thinks it's a bit of fun?
When those boys called for Hardy's daughter the step son was one of them. Is he like resident camera man? (Yuk)
Also the step son has been in it little enough for him to be unexpectedly involved but not the main culprit iyswim?
Maybe the ex didn't do it, but knows about taxi man's exploits (perhaps through school) and told him at the party that Trish was 'available'.
I don't know how Leo the football twine man fits in, he is dodgy as well. I think he might be in on it as well, maybe helping to set up situations. Maybe it was him that the ex told about the party/Trish's attendance at the party?
I think Jim is just a bellend but didn't rape Trish.
Have just read that back and realised how ridiculous it all sounds!