Clodagh Stenson
BBC South Investigations
Blenheim Palace
The solid gold toilet weighed 98kg (216lbs) and was insured for $6m (£4.8m)
Thames Valley Police
James Sheen (left) and Michael Jones were both part of the audacious heist
Sheen was a key player in the heist - a career criminal and the only man convicted of both burglary and selling the gold.
He pleaded guilty last year after police found his DNA at the scene and gold fragments in his clothing.
Police also recovered his phone which contained a wealth of incriminating messages.
Shan Saunders, the senior crown prosecutor on the case, said it was "unusual to have a phone that when downloaded contains so much information".
Thames Valley Police
Sheen sent this picture of a bag of bank notes with the message: "520,000 ha ha ha"
During the trial, jurors heard voice messages sent by Sheen to Fred Doe, a Berkshire businessman who was convicted for conspiring to sell the gold in March.
Saunders said interpreting the messages was "a long and complicated process", due to the blend of coded language, Romany slang and cockney rhyming slang used.
In one message, Sheen confirmed he was in possession of some of the gold toilet.
It read: "I think you know what I've got... I've just been a bit quiet with it."
He also used the word "car" as code for gold.
" The car is what it is mate, innit? The car is as good as money," he said.
'Truly shocking'
Within two weeks of the heist Sheen had sold 20kg (44lb) of gold - about one fifth of the toilet's weight - to an unknown buyer in Birmingham for £520,000.
A BBC investigation in March revealed Sheen's criminal history.
It found he had been jailed at least six times since 2005 and led organised crime groups that had made more than £5m from fraud and theft - money which authorities had largely failed to recover.
Sentencing Sheen, Judge Ian Pringle said he had a "truly shocking list of previous convictions".
Sheen was already serving a 19-year sentence for previous crimes, and he will serve the four-year sentence for the heist consecutively.
Thames Valley Police
Jurors were shown selfies that Jones took with the toilet
The judge said Jones also had a "long and unenviable list of previous convictions".
In the week leading up to the heist, Jones, who worked for Sheen as a roofer, paid two visits to Blenheim.
Just a day prior to the raid, on Sheen's instructions, he booked a timeslot on Blenheim's website to use the gold toilet.
While inside the cubicle, Jones snapped pictures of the golden toilet and a lock on the door.
In one of the trial's lighter moments he confirmed he did use toilet, calling the experience "splendid".
CCTV of the daring raid was shown in court
In October 2019, just one month after the heist, police arrested Sheen and Jones but they were subsequently released. They were not charged for another four years.
Det Supt Bruce Riddell of Thames Valley Police (TVP) said: "We arrested 12 people in total in the investigation, and that brings with it a huge amount of digital devices to examine."
He also said it took months for key forensic evidence to be identified and that the investigation was slowed by the pandemic.