Dd said the paper 3 was fairly okay.
Apparently the leak was late last night with someone offering it for sale (apparently it started low and quickly rose). Some people put 2 questions on line with bits scribbled out so you could see the diagram but not the questions, so not very helpful really.
She got a text after from someone saying had they heard it had been leaked, but no one said anything before (despite being on a number of maths group chats), so I don't think it's as extensive as all that.
It wouldn't really be fair to ask them to resit. Just imagine if you hadn't seen the paper, and did really well in this one and then made a hash of the resit. They really had to stop it before anyone sat it.
You also can't compare it with the other exams as they were pure and these were applied, so people could naturally be better at one.