A retained firefighter killed when his car hit a wall in West Sussex was responding to a 999 false alarm.
Paul Keenor, 23, was driving a Toyota Celica on Wall Hill Road in Ashurst Wood, near East Grinstead, when it crashed at about 23:55 BST on Saturday.
The building contractor, from Ashurst Wood, was a crew member with East Sussex Fire and Rescue (ESFRS).
He had been based at Forest Row fire station since 2011.
Sussex Police said he had been responding to his alerter as a result of a 999 call received by ESFRS when the crash happened.
A spokeswoman for East Sussex Fire and Rescue Service said the call turned out to be a false alarm. No other vehicle was involved.
Flowers left at the scene of the crash included a tribute from Mr Keenor's father, who said: "The world will never be the same without you."
In a statement, East Sussex chief fire officer Des Prichard said: "Paul was a dedicated and lively member of Forest Row Community Fire Station.
"He was committed and always ready to serve his community."
Mr Keenor's fellow firefighters at Forest Row added: "The crew at Forest Row have lost a brother and a great friend.
"Paul's personality was huge, and his kind nature and brilliant sense of humour will be missed enormously."
Mr Keenor, who had Type 1 diabetes, was a keen rugby player and a father of two sons, aged three and 17 months.
His father Graham said he was diagnosed as a diabetic at the age of 10 but did not let it stand in his way.
He added: "It was typical of him that when his alerter went off on Saturday night his only thought was that someone might be in trouble and he needed to help."