LONDON — More than 100 business leaders on Tuesday voiced their support for the U.K.'s center-left opposition Labour Party, nearly five weeks before the country heads to the polls. The group, which includes Wikipedia founder Jimmy Wales and former vice-chairman of JP Morgan Cazenove Charles Harman, said in an open letter to The Times newspaper: "We, as leaders and investors in British business, believe it is time for a change." The writers of the letter claim that the U.K. economy has suffered from a decade of stagnation amid a lack of both political stability and a long-term, consistent economic strategy. The country has been "denied the skills and infrastructure it needs to flourish," the letter says. The Labour Party has "shown it has changed and wa