The 63-year-old, who has been identified as Paul Dabin, of no fixed address, died in hospital after a cardiac arrest in Brook Retail Park in the early hours of Thursday morning (June 8).
His death was initially treated as suspicious while police continued to investigate what happened.
Commercial Road was cordoned off for much of Thursday, with no access to the Country Bus Station.
Two men, a 31-year-old and a 32-year-old were arrested on suspicion of murder after Mr Dabin’s death and were held in police custody.
But both were released on Friday (June 9).
Senior investigation officer Detective Chief Inspector Leighton Harding said: “Our initial enquiries led to the arrest of two men in their 30s.
“As our investigation has moved to the next stage we have been able to determine that no further action should be taken against the 32-year-old arrested and the 31-year-old has been released, under investigation, whilst we follow up on details of the incident.
“We understand that arrests following a death will be alarming to the local community but we are satisfied that there is no risk to the wider community.”
Police have confirmed today (Sunday) that Mr Dabin died of natural causes and with no evidence of an assault.
His death is now not being treated as suspicious and is being dealt with by the coroner.
“My thoughts are very much with Paul’s family at this sad time,” said DCI Harding.
“I would like to also thank the public and local businesses for their patience and understanding whilst we conducted our investigation.”
Mr Dabin’s next of kin have been informed of the development and are being supported by a family liaison officer.