Manchester - British Prime Minister David Cameron kicked off his re-election campaign on Saturday for May's tight poll by echoing his main rival with a new promise to improve the state-run National Health Service (NHS).
Cameron's centre-right Conservatives are neck-and-neck in opinion polls with the main opposition centre-left Labour, led by Ed Miliband, who says May 7's vote will be the tightest for a generation.
In a rallying call to activists at his Conservative party's spring conference in Manchester, northwest England, Cameron vowed to deliver a "truly seven-day NHS" providing a service as easy to access in the evenings and at weekends as on weekdays.