Sue a rogue lender?

I read an interesting article over at The Guardian in regards to new lending regulations that allow people to take lenders to court if they think that the credit was offered on unfair terms. It mentions credit agreements on cars and furniture specifically, but I wonder if they have those predatory paycheck loan places in the UK like we have here in the US. Those would be the people to take to court. At least from what I know about them - I have never been desperate enough to go to one of those places, but from what I have read online they are pretty bad.