Sir Chris Hoy told the BBC: "It's just immense pride to be able to do it here, in the UK, in front of this crowd who have been phenomenal. You can't overstate what this means to us in front of a home crowd. This is a once in a lifetime opportunity."
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The M20 in Kent has been closed in both directions after a pedestrian bridge allegedly collapsed on the motorway on Saturday.
The AA have warned of traffic jams and urged people to carry extra water in their vehicles because of the warm weather.
Chefs in Italy are urging restaurants around the world to serve pasta all'amatriciana - a rustic dish that originates from Amatrice.