Michael Bergmann, managing director of Glass’s, commented: ‘I would personally like to thank Adrian for the many years of service he has brought to Glass’s. He has been our face to the world for a long time and we are deeply sad to see him go.

‘It has been an absolute pleasure to have worked with Adrian. His enthusiasm, knowledge and contribution to our business will be greatly missed, and I know the entire Glass’s team will join me in wishing him every success in whatever venture he pursues in the future,’ he added.

Rushmore's departure comes less than three months after Glass's announced he was to take on a new role as director of market intelligence from his previous position as managing editor. At the same time Richard Parker, who will replace Rushmore in his current role, was appointed as director of valuations and analysis.

Rushmore, who has not announced any new appointment, said: ‘I have enjoyed every minute of the past 26 years working at Glass’s, it has been a privilege to watch the company grow, develop and take the lead on providing a definitive source of data to the used car market.

‘I will of course be sad to leave my days at Glass’s behind, but I’m also excited about what the future has to hold. I would like to thank everyone at Glass’s for the friendship and support they have given me in the past, and I look forward to continuing that friendship for many years to come,’ he added.