"One of the undoubted highlights of the summer was the fantastic community spirited, magenta and pink clad Ambassadors, who gave up their time to welcome the world. I am delighted that we have delivered on our promise to build on the remarkable success of the volunteers during the Games with the expansion of the Ambassadors Programme.
"Armed with guides and information about the city, they are brilliantly placed to tempt visitors and Londoners alike with the smorgasbord of world class shops, theatres and restaurants that are on offer."
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Police were called to a fight between two groups of people on the petrol station forecourt at Cobham services.
The force says the increased police presence should provide reassurance to the public - without affecting the spirit of the event.
Resident group Justice 4 Grenfell say they were not consulted and will raise concerns about the appointment at the highest level.