"He was about two metres tall, he was huge, and he had small glasses, " Mr Van Veen recalls.

BBC: Animal behaviour in the boardroom

Ape Management combines Mr Van Veen's two passions.

BBC: Animal behaviour in the boardroom

The mainly female audience of business people attending the course nod violently when Mr Van Veen describes how most offices have a set of dominant males, who slap each other's backs, stamp their feet and draw themselves up tall.

BBC: Animal behaviour in the boardroom