Driver and Vehicle Licensing Agency - Make sure you ask to see the V5C (logbook) before you buy a vehicle. The seller can tell us online about the sale at https://www.gov.uk/sold-bought-vehicle and
Can I Sell My Car Without a Log Book (V5C)? [2022 Guide] | Carplus
The V5C document: all you need to know about the log book | BuyaCar