As s1rs said

http://www.dvla.gov.uk/vehicles/relinfo.htm
"Previous keeper details

If you are the current keeper you can get information about any earlier keepers on application. You should write to: Vehicle Record Enquiries, Vehicle Customer Services, DVLA, Swansea SA99 1AJ quoting the registration number of the vehicle and giving the reasons for your request. A fee of £5 is payable.
"