Tens of thousands of runners have taken part in the London Marathon, many with black ribbons on their vests in honour of the victims of the Boston bombings.

"Marathon running is a global sport," he said.

• Former paratrooper Mike Ellicock broke a world record by running with a 40lb (18kg) pack in three hours 25 minutes and 21 seconds
• A group of 15 people took part in memory of Leicestershire runner Claire Squires who died near the end of the course last year
• Staff Sergeant Paul Chamberlain, of the Royal Corps of Signals, "completed" the course on a treadmill in Afghanistan, raising £1,000 for forces charities
• Shadow chancellor Ed Balls thanked his political adversary George Osborne for sponsoring him as he completed his second London Marathon.