Police are offering a reward for anyone who can provide detectives with information which could help them solve a murder investigation.
Builders had been working in the disused pub when they discovered human remains in the freezer.
Bigg had disappeared in 2012 at the age of 67 and his body had to be identified by his dental records, while a post-mortem provided an inconclusive verdict on a cause of death.
Previous appeals from the Met Police had managed to shed some light on who Bigg was and further details about his life but thus far investigators have not managed to uncover the truth about his death.
Police have urged anyone who knows something about Roy's death to come forward, including through anonymous routes, but the Met have now offered a reward to those who may have information as well.
While he was 67 when he went missing in 2012, police have placed his age at the time of his death at 'about 70' and are hoping the public can help them fill in the details.
Detective Chief Inspector Kelly Allen, of the Met’s Specialist Crime Command is now offering a financial reward if people can point them in the right direction.
They said: "It’s been more than two years since Roy was found.
"Although our investigation and previous media appeals have provided us with information about Roy’s life, we still need your help to identify who is responsible.
"Roy went missing in February 2012. We believe his body may have been in the freezer a number of years and that he was aged about 70 when he died.
"Where was he between 2012 and 2021? To date there have been no confirmed sightings of him in this nine year period. Can you help?
"Anything you can tell us may prove invaluable in helping us discover what happened."
Police gave Bigg's birthday as 8 September, 1944, and have appealed for 'any information may be of real significance to our inquiries' from people who knew him, even if only briefly.
Anyone who does have information on Roy Bigg has been encouraged to call the Incident Room on 020 8345 1570 or 101, or post on X (formerly Twitter) @MetCC quoting reference CAD 4332/15Oct21.
People can also anonymously call Crimestoppers on 0800 555 111 to submit information.Featured Image Credit: Met Police/Google maps