You have to prove that the mileage record has not been entered correctly on the DVLA database. It can be very difficult to get them to accept this. This is from the Backroom back in 2009, but the DVLA link no longer works: "Check it against the National Mileage Register (NMR). This is maintained and updated by HPI (may involve doing an HPI check if not done one already). If this shows the same discrepancy, send to DVLA with covering letter. If this fails, DVLA has a complaints procedure you need to follow. See www.dft.gov.uk/dvla/contactus/if_things_go_wrong.a...t;