Mo Farah says taking part in the London Marathon yesterday was a good experience, but he also admits he still has a lot to learn about the race.
As planned the Olympic champion at 5,000 and 10,000 metres dropped out at the halfway stage just past Tower Bridge.
He will run the full 26-miles next year, today he said that the pace surprised him.
London spectators have spoken about their determination to attend this years Marathon- despite events in Boston.
A former professional footballer is aiming to become the first person with motor neurone disease to run the London Marathon.