How Keith Waterhouse made a Tory lose his trousers at the Conservative party conference

Mike Molloy in his obit on Keith Waterhouse in the Guardian today tells the following story: "His personal humour often whirled into the surreal, as his fellow journalist Peter Tory learned to his cost. One night, in a Blackpool restaurant during a Conservative party conference, Waterhouse inveigled Tory into a bet which resulted in Tory losing his trousers. Waterhouse made off into the night with the item of clothing and Tory had to borrow a pair of the chef's pants.
"Back at the bar of the Imperial hotel, he made himself busy introducing Tory's trousers to various Conservative party grandees, insisting they shake a proffered leg by way of greeting. In later weeks, Tory would receive sinister, late-night calls, claiming to be from his trousers, relating, in a falsetto, northern accent, the various risque adventures he was enjoying with his new master."