More than 4,000 in Oxford Half Marathon

Oxford Half Marathon 2012
Runners at start of the Oxford Half Marathon Photo:

He's a sporting legend who made history running the first mile in under 4 minutes - but today Sir Roger Bannister was back in Oxford encouraging people to run just a bit further. He had been invited to start the city's half marathon and admitted the sport has changed a great deal since his record breaking days as Heather Edwards reports.