Campbell played by Bernard Horsfall is the final ally of On Her Majesty’s Secret Service. With the help of Marc Ange Draco, Bond is able to locate Blofelds lawyer operating in Bern, Switzerland.
When Bond breaks into his office he goes to the window where he collects the Safe Cracker and Photocopier - sent over on one of Draco’s cranes from the construction site opposite by Campbell. Bond uses the machine to gain entry to Gumbold’s safe and photocopy some documents, placing the machine back in the crane just before Gumbold returns.
When Bond meets Irma Bunt in his guise as Sir Hilary Bray, Campbell is assigned the job of following Bond to make sure he doesn’t require any assistance. He follows Bond, but cannot go any further when Bond takes a helicopter ride up to Piz Gloria. Campbell attempts to bluff his way up to the facility using the cable car, but is stopped by Grunther. Later Campbell climbs the mountain reaching Piz Gloria, where is detained and eventually killed as a warning to Bond and others.
Campbell is a MI6 agent assigned to assist Bond. While he is helpful in Bern delivering the Safe Cracker and Photocopier he is less helpful around Piz Gloria, where he appears to be too obvious in what his intentions are. With little dialogue and few scenes, not much is learnt about the character. §