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31 August 2010, 17:18
The 54 year old man was rescued from the flat in Kilgour Court on Bassett Road on Sunday 22nd August.
He was later taken to a specialist burns unit at Chelmsford hospital in Essex.
Bedfordshire Police say he passed away on Friday 27th and a post mortem has yet to be held. The victim's details are not being released at the moment.
A 42 year old woman was arrested in connection with the fire and was released on bail. Police say they are currently investigating the cause of the circumstances surrounding the fire.
A spokesman added: "A full examination of the property by fire investigators and forensic experts is currently being carried out."