The women's cycling road race is due to begin at midday today on The Mall.
Much of the route is unticketed, so thousands of spectators are expected to turn out to line the roads.
You can see a map of the route here.
G4S should be the first outfit on a Government blacklist of high-risk firms that have failed to deliver, MPs have said.
Transport for London has created a new version of the tube map, to celebrate the success of Team GB at the London Olympics.
Olympic hero Mo Farah has shown off the newborn twins who inspired him to double gold-winning victory - and finally revealed their names.