Floral display marks 100 days to London Olympics A special clock in London's Trafalgar Square counts down to the city hosting the Olympic Games 100 days from now. England's capital is expecting an estimated five million extra visitors and the chairman of the International Olympic Committee coordination commission Denis Oswald said: "This summer will be a summer like no other." Standing in Trafalgar Square, Fabrice Levasseur, a tourist from Toulouse, also thought it was a day worth marking. It's a symbolic number - 100 days to go before the Olympic Games. It's going to be a great event for London and for the whole world. The city looks beautiful today, it's looking great, and after all the works that are going on have been completed, it will look even better," Levasseur said. Celebrating 100 days to go, a depiction of the Olympic rings made up of 25,000 flowers is on display at London's famous botanical Kew Gardens. At the same time, it is full speed ahead on essential work needed to update London's transport system. The city's underground train network is the oldest in the world and will need to cope with visitors as well as the everyday needs of Londoners.