A working smoke alarm meant a man escaped a fire that destroyed his house.
The cottage on South Brink, near Elm, Wisbech, caught fire in the early hours of Wednesday morning but the smoke alarm alerted the resident to the danger and he got out of the house.
Investigations by the fire department suggest the fire was accidental, caused by electrical equipment.
Ady Slack, Station Commander, said: “When firefighters arrived there was a well developed fire in a two-storey cottage. One man was safely out of the property after his smoke alarm alerted him to a fire.
“Flames were coming through the roof of the conservatory and had spread to the lounge area by the time crews arrived.
“The fire quickly took hold of the property and the roof and first floor have since fallen through, leaving just the shell of a house.
“Sadly, this home has been completely devastated. However, the man inside made it out alive and that is thanks to his working smoke alarm. We would urge all families to make sure they have a correctly fitted working smoke alarm, which is regularly tested.”
A total of nine fire engines attended the incident, which took more than 12 hours to put out after the alarm was initially raised at 1am. The firefighters had to work in tough conditions due to the unsafe structure and the building collapse.