Despite the Consumer Rights Act of 2015 and a plethora of statutory and case law a dealer has limited liability over a car sold for £900: www.honestjohn.co.uk/faq/consumer-rights/ However, if you specifically asked about the timing belt and waterpump and if he specifically told you that both had been replaced in 2018 and they have not been, you are entitled to your money back and can use Moneyclaim to sue for it, though even Moneyclaim is far from free: www.gov.uk/make-money-claim.

There's more here: www.honestjohn.co.uk/how-to-reject-a-car-your-cons.../