HBJ Gateley Wareing property partner David Boyce has appeared in court charged with conspiracy to rob and extort money in connection with the theft of a Leonardo da Vinci painting worth some £30m.

Boyce is the latest person to become involved in the case and joins a group of men, including former HBJ Gateley corporate partner Calum Jones who was arrested at the Anglo-Scots firm’s Glasgow office last October.

Boyce, who was charged by police in July, is understood to have agreed to step down before being charged. Jones also resigned shortly after he was charged by police last year.