Iconic characters Mario and Sonic the Hedgehog have been in town to promote a new video game based on the London 2012 Olympics.
The pair visited landmarks such as Tower Bridge, Big Ben and Parliament.
Mario & Sonic at the London 2012 Olympic Games will be released for the Nintendo Wii and 3DS in time for the Games next summer.
The game from Sega will feature a range of Olympics events including football, equestrian, athletics, aquatics and table tennis.
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