The duo, PC Shand Panesar and PC Craig Nicholson, have been praised for their 'exceptional act of bravery' after leaping into action before London Fire Brigade reached the house in Bridgwater Road, South Ruislip at about 8.30pm.
It took nearly and hour and a half to extinguish the blaze after four fire engines and 21 firefighters arrived about 8.40pm. The cause of the fire is under investigation.
The Metropolitan Police Service said in a statement: “On establishing that a woman was trapped inside the house, and realising the need for urgent action, both male officers entered the burning building and rescued the woman prior to the arrival of London Fire Brigade a few minutes later.
“The officers administered first aid including CPR, before the arrival of London Ambulance Service. The 30-year-old woman was taken to hospital where her condition is described as stable, not life threatening and non life changing. The woman does not wish to be identified at this time.”
Acting Chief Superintendent Colin Wingrove of Hillingdon said: "This represents an exceptional act of bravery by the police officers who put themselves in harm's way to enter a burning building and save a woman's life.
"They made sure she received the urgent medical care she needed once out of the house, which included giving CPR. Whilst the woman remains in hospital receiving treatment there is an investigation taking place to establish the cause of the fire.
"I am extremely proud of the officers, and they will be back on duty tonight with all our other teams working as ever to keep Hillingdon safe."
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A London Fire Brigade statement read: “Four fire engines and 21 firefighters and officers were called to a fire at a house in Bridgwater Road, South Ruislip last night.
“Part of the ground floor of a terraced house was damaged by fire.
“One woman left the property before the arrival of the Brigade and was treated on scene by London Ambulance Service before being taken to hospital.
“The Brigade was called at 8.41pm and the fire was under control at 10.09pm. Fire crews from Ruislip, Northolt and Southall fire stations attended the scene.”