There you go just found this on the consumer action group forum
The bit that will interest you is under the consumer credit act part.
Not sure what you can do as you have already let them take it away
??
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Cagger since Feb 2008
Posts 161
Re: Bought a car with outstanding finance (HP) what are my rights?
Hiya Suzanne
I have found this piece of info from the trading standards web site ...
Private sales
There are some situations where your legal rights will be reduced.
The general rule is ‘let the buyer beware’ when you buy from a private individual. It is up to you to find out whether the car is of satisfactory quality, to make your own checks on what you are told and to take responsibility for your choice, as the seller is not liable for the satisfactory quality of the vehicle. You are still entitled, however, to expect the car to be ‘as described’. If the advertisement says ‘2000 Ford Focus’ or ‘excellent condition’ then it should be exactly that. It is important to remember that it may be much more difficult for you to enforce your rights against a private individual.
Whether you buy privately or from a motor trader, you are entitled to expect that the car is roadworthy when you buy it, unless you and the seller clearly agree it is to be sold as scrap. You should take note that a car sold with an MOT Certificate does not necessarily mean that it is roadworthy.
You are also entitled to expect the seller to have ‘good title’ to the car. In other words, to be the owner or authorised by the owner to sell it. If you buy a car later found to be stolen, you have no legal right to keep it. You will have to try and get your money back from the seller.
The Consumer Credit Act 1974 gives ‘good title’ to the innocent private purchaser of a car which later turns out to be subject to a claim by a finance company because of a previous, unpaid hire-purchase agreement. This means that the finance company is not entitled to repossess the car from you. Remember, this does not apply to cars which have been stolen, or cars that were subject to a lease or hire agreement.It is worth noting that some motor traders pretend to be private sellers to avoid their legal obligations to consumers. If you come across a situation like this, contact Consumer Direct on 08454 040506.