John "Jack" London was the first black British athlete to win an Olympic medal
The first Olympic medals to be won by a black British athlete have been put up for auction.
Valued at more than £3,500, the medals belonged to John "Jack" London, who won silver and bronze medals at the 1928 Olympics in Amsterdam.
The collection featured on the BBC's Antiques Roadshow when his great niece Christine Downham, from Rossendale in Lancashire, had them valued.
She said the collection "deserves to be in a museum".
The collection has been valued at more than £3,500
Mr London was born in 1905 in British Guiana (now Guyana). He moved to London as a baby and returned to British Guiana before eventually settling in London.
He won a silver medal in the 100m sprint and a bronze medal in the 4x4 100m relay in 1928.
The collection also includes a number of other athletics medals and a commemorative Olympic medal, which London had gold-plated "to create a full set", a spokesman for Hansons Auctioneers said.
London (second from bottom) won silver in the 100m sprint in 1928
Mrs Downham said the medals had "just been stuck in a cupboard where no-one can see them".
She added: "Because my great uncle was the first black athlete to win Olympic medals for Great Britain, perhaps his collection deserves to be in a museum.
"We're very proud of his achievements.
"The medals came to me after my dad passed away four years ago. He loved talking about Jack."
After retiring, London had a career in film and theatre
The 60-year-old retired pub licensee said she had learned about Jack from her father.
"Apparently, he was quite a character and a bit of a ladies' man," she said.
"He was very talented. He was academic, brilliant at sport and very musical. He ended up on stage and in a film."
Experts on the BBC show valued the medals at £3,500 and they will be sold, along with other items, including a trophy, photos and relay batons, at the auctioneers in Derbyshire on 19 November.
One of the relay batons has the names of the team that ran in 1928 carved into it
