I assumed it had to be £8 an hour but even then, they're having a laugh. Not a single "expert" is going to do it for that price. I can get £35 an hour tutoring A level maths and I'm on the cheaper end around here. Even an unqualified student could get more than that; our college pays the A level students £10 per hour to give extra support to their GCSE retakers.
They're offering so ridiculously below the going rate it made me think it has to be some kind of scam. MN, do you actually verify who these people are at all?