Extension Lead Converter 13 pin Euro (car) to Twin 7 pin N & S Type Socket ( trailer / caravan) - Towing and Trailers Ltd
7 + 13 Pin Towbar Socket Mounting Bracket, Plate, SINGLE, Trailer, Van, Maypole : Amazon.co.uk: Automotive
Connector Socket Mounting Bracket, Right Angle Plug Socket Bracket for 7 Pin 13 Pin Caravan Towing Trailer Connector with Complete Screws & Nuts Black Auto and Motorcycle Parts : Amazon.co.uk: Automotive
Black 13 Pin & 7 Pin Socket Plate
Convert your tow car to 13-pin electrics - Practical Caravan