A 92-year-old war veteran had his medals stolen on the 70th anniversary of the D-Day Landings.
The victim was at home in Whetstone at 9.25am on Friday, June 6 when a man, claiming to be from a water company, knocked on his door and said he needed to check the water pressure.
The fraudster was allowed in and appeared to look at the taps, before leaving a short while later.
However that evening, the victim noticed the items in his bedroom had been ransacked and 11 war and service medals had been stolen.
The victim had served in the Grenadier Guards during the Second World War, serving mainly in Italy and North Africa.
The man who gained entry to the house is described as white, 5ft 10ins tall and of stocky build. He spoke with an Irish accent and wore grey clothing similar to that engineer would wear.
Officers from the Burglary Squad based at Colindale Police Station are investigating. Anyone with information is asked to call police on 101 or Crimestoppers anonymously on 0800 555 111.