Mr Dean had been living for some years at Waltham House, which is an extra care scheme for older people run by Housing 21.
Helen Hart, locality manager for Housing 21 said:
We are very sad to hear of the death of Reg Dean.
He was an inspiration to us all and will be greatly missed.
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His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.
The Foreign Secretary said he thinks the health service should be "at the very top of the list" for a windfall after the UK leaves the EU.
Turning wet and breezy from the west overnight.