Matt Frei is Leading Britain's Conversation.
A prosthetic leg and a life-sized Spider-Man doll are just some of the more unusual objects left on London's tubes and buses.
A wooden leg, nun doll and a giant toy warthog are among the oddest items left on the Tube.
Someone left a hairdressing mannequin on the London Underground
A very old car-phone and the latest iPhone were among items left on London's transport.
More than 300,000 items were left on the capital's trains and buses last year, with the most popular items being umbrellas and wallets.
All lost phones get placed in the movile bin.
All items handed in to TfL end up at the three-storey building next to Baker Street station and are stored for three months before being donated to charity, sent to auction or recycled.
Have you accidentally left your life-sized Spider-Man doll on London Transport? It has pride of place in the Lost Property Office.
Transport for London worker Paul Burke pushes a trolley loaded with items of lost property at the Transport for London Lost Property Office.