The Corgi red London Bus has been Horby's top-selling product during the Olympic Games.
"This is an iconic, classic symbol of both heritage and contemporary Britain," said Alex Balzaretti, project manager for the London 2012 range at Hornby.
"By the time the contract expires for London 2012, Hornby will have sold in excess of 350,000 pieces of product in the London Bus shape, either as a Diecast model or as a keyring.
"Ever since Boris Johnson took it to represent the symbol of London at the 2008 Beijing games handover ceremony, it has become synonymous with the London 2012 games."
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