Boris Johnson was on the startling line with Mo Farah but his focus seemed to be on another rival.
The Mayor was doing his bit for keeping the Olympic spirit alive, backing a report which warns despite such a fantastic year of sport, fewer people are actually getting active.
He was at a school in south London earlier, the day after being invited to lunch by the Prime Minister. But is the truce between the two rivals already over? Our Political Correspondent Simon Harris on why Boris Johnson is set to attack the Government once again.
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Paramedics were on standby outside the police cordon as armed officers stood by the property.
A team of researchers has taken samples from the ten busiest London Underground lines to work out which are the dirtiest.
The action comes on top of an emergency timetable which has seen hundreds of trains a day being axed.