A police officer jumped into near-freezing water in the middle of the night to save a man from the River Thames.
Pc George Alleway was called to Kingston, south London, at 0245 GMT on 12 February after residents reported a man in his 30s in a distressed state.
After seeing a motionless body floating face down about 10 metres from the nearest jetty he jumped in.
The 6ft 7in (2m) man was helped from the water and given chest compressions.
The man was earlier captured on CCTV jumping into the river with his shirt off.
After being rescued and given first aid by officers, he began to show signs of life and was put into the recovery position.
The London Ambulance Service took him hospital and he is making a good recovery.
Pc Alleway is said to be a strong swimmer.
Insp Iain Lewis, of Kingston Police, said: "The river was icy and the man could not swim.
"Had it not been for [Pc Alleway's] brave actions this story would have had a tragic ending.
"Pc Alleway has already been personally praised for his heroic actions."
Insp Lewis added: "The response of our team was exemplary."
In May 2007 two PCSOs were criticised after not entering a lake to save a drowning 10-year-old boy.
Manchester Police claimed at the time they were not trained to carry out such a rescue.