May pays tribute to Queen's dedication to Commonwealth

Prime Minister Theresa May is to pay tribute to Queen Elizabeth for leading the Commonwealth with "service, dedication and constancy" as she thanks her for opening her homes to welcome leaders from across the world this week.On Thursday up to 47 leaders will gather at Buckingham Palace, one of the queen's homes, where May will thank the Queen.Over many years you have been the Commonwealth's most steadfast and fervent champion," May will say, according to pre-released extracts of her comments.