The deal, which includes 2009, represents the largest commercial partnership in European rugby history.
The initial three-year agreement ran from 2003 up to and including this year's Championship.
Howard Moody, group director, communications, The Royal Bank of Scotland Group, said: "The RBS 6 Nations is the only major sporting event that sees nations across Europe pit themselves against each other on an annual basis, making it the greatest annual rugby tournament in the world.”






