LONDON (Reuters) - British Prime Minister Theresa May appointed lawmaker Julian Smith as her new Chief Whip on Thursday, promoting him to head the office which is responsible for making sure May s Conservatives vote in support of the government. Smith, 46, had previously been a deputy chief whip. He replaces Gavin Williamson who was earlier appointed as defense minister. The government said lawmaker Esther McVey would take on Smith s former role. 