After the advert I found I suppose we should all feel pleased that this position is paid at all ... 
I just can't believe anyone thinks this is ok. £2 an hour! Sole charge! (And don't get me started on my assumptions about parents who write about how exceptionally 'CLEVER' and 'ACTIVE' their child is without any sense of irony or self-awareness...!)
I think that some families really believe that if people will apply for a position, then that must mean it's acceptable. And believe that looking after their child is such a privilege that anyone should be pleased to do it, for almost no money!