As experts were prevented in an invaluable document at a university library

A manuscript – was once considered an unofficial copy of Magna Carta – Now believed to be a genuine version and ” one of the most valuable documents in the world ”According to the UK academics.

Harvard law school paid $ 27.50 (then about 7 pounds) for her in 1946 and for years she remained in her library, her true unknown identity.

But two professors of medieval history have concluded that it is an extremely rare and lost original Magna Carta from 1300 – and can be worth millions.

Explains Eleanor Doyle of BBC Newsbeat.

Video from Tom Joyner, Anna Lamche, Ian Casey and Tom Richardson.