A portrait purporting to be of a living Lady Jane Grey, best-known from a post-death painting of her execution, has gone on display.

Experts believe they have uncovered enough evidence to suggest a Tudor-era portrait could be the only known image of Lady Jane Grey painted in her lifetime. She was "the nine days queen", whose brief reign was an unsuccessful bid by Protestants to prevent the accession of her Catholic cousin Mary I (1553 to 1558).

Researchers may have found the only known portrait of Lady Jane Grey, which was defaced in an iconoclastic attack.

Mystery Solved? Is this the only portrait of tragic teen Queen Lady Jane Grey? - Compelling evidence that a 16th-century painting depicts Lady Jane Grey – the monarch executed in 1554 – in a stunning

Peter Moore, from Wrest Park, explains the significance of the discovery.

Mysterious portrait could be of ‘Nine Days Queen’ Lady Jane Grey – analysis - Lady Jane was executed on Tower Green at the Tower of London on February 12 1554 at the age of 17.

A sixteenth century portrait which may depict the famous 'nine days Queen' Lady Jane Grey has been loaned to Wrest Park, an historic property in Bedfordshire run by English Heritage. The loan, from a private collection, is accompanied by interpretation regarding a recent research and conservation project on the picture.