Brexit worries hit UK economy as Conservatives start choosing PM

By Kylie MacLellan and William James LONDON (Reuters) - Worries about the economic impact of leaving the European Union hit Britain's property market and drove the pound to a new 31-year low on Tuesday as Conservative members of parliament began voting for a new prime minister. Interior minister Theresa May and Andrea Leadsom, a junior energy minister, emerged as early front-runners to replace David Cameron, who has said he will step down after Britons voted on June 23 to break away from the EU.