The International Bar Association's family law committee could not have written a better backdrop script for its London conference last week. As divorce and children law practitioners from around the world gathered in the capital, the Law Lords handed down their judgments in Miller v Miller and McFarlane v McFarlane, with one wag specialist lawyer describing the ruling in the former as being an adulterer's 'licence to bonk'. But what was the burning question at a conference drinks reception hosted by London law firm Dawson Cornwall - which international clients are the most difficult? A straw poll of the high-flying English lawyers suggested that demanding Germans came top, pushy and arrogant US businessmen came second, and, surprisingly, in third place came the Poles. Bang goes the myth of the happy-go-lucky Polish plumber.