THE body of a man - found with a ticket to see Led Zeppelin in concert almost 40 years ago - is one of four corpses Derbyshire police are still trying to identify.
The man, who was white and aged between 20 and 40, was discovered in the false roof of flats on May 16, 1977, just two weeks before he was due to see the band at London's Earls Court Arena.
Information on the UK Missing Person's Bureau website states that he had been dead three weeks, was diabetic, had a full beard and dark brown receding hair.
And until he is formally identified and the circumstances of his death are found out, a file will remain open.
A police spokesman said: "There are currently four cases listed on the UK Missing Persons Bureau website whereby bodies have been found in Derbyshire that have never been identified.
"In cases such as this, they are regularly reviewed and files remain open."
The Led Zeppelin fan's body was discovered in Bakewell 37 years ago.
He was found wearing a black donkey jacket with tartan lining, a maroon shirt, blue jeans, black zip-up calf-length boots and a camouflage bush hat.
Police also discovered a train ticket from Inverness to the Kyle of Localsh dated July 3, 1975, and a Bang and Olufsen radio.
Sherri McAra, from the National Crime Agency, works on the UK Missing Persons Bureau, which monitors the 500-plus cases of unidentified bodies across the UK.
She said: "Any person who has been reported missing for more than 72 hours is referred to us by the relevant police force area, as is any body not identified 48 hours after it has been discovered.
"In the case of older cases, they are reviewed on a regular basis and if the body is still top be identified the case remains open.
"In England and Wales, there are currently 543 cases still open, the most recent from July.
"The larger cities such as London and Manchester have more open cases but force areas with a large coastline also tend to have high numbers because of bodies that are washed up on the shoreline.
"For example, there is a case in Cornwall of a sailor who is believed to have fallen overboard and fished out of the water in 1968."
There are three other cases in Derbyshire, the oldest dating back to 1971 when the body of a man was discovered at the side of a road close to Topley Pike Quarry, near Buxton.
The agency believes the man was German and aged 45 to 55. He was believed to have committed suicide by overdosing on tablets.
On July 14, 1996, the body of a man aged 40 to 50 was discovered in a sleeping bag near a railway embankment at Stanton, near Ashbourne.
And on October 6, 1989, the body of a man aged 30 to 40 was found hanging from a tree at Bank Hey Top, in the Derwent Valley.
He was wearing a Lee Cooper denim jacket, a blue and white checked shirt and khaki trousers.
Among his possessions were two Manchester City Council bin bags and a Thomas Hardy novel.
Nottinghamshire has two unidentified bodies, both dating back to the 1980s, while Staffordshire has four.
Ms McAra said: "With the onset of improved forensic and DNA technology, we are hoping that more of the older cases can be solved.
"But back in the 1970s, as with two of the Derbyshire cases, there was no such advancements, so the opportunity to identify them through those methods may be lost."
Anyone with information on the four unsolved cases should call the agency on 0845 000 5481.
For more details about the missing people and others across the UK visit www.missingpersons,police.uk.
