Hundreds of suspected cannabis plants were found inside a Harrow home and police believe if they are confirmed to be illegal drugs they would have had street value of £450,000.
The huge haul of plants was located by a police helicopter in the Belmont area before a warrant was executed at the address on Tuesday morning (March 6).
Harrow borough police seized the plants from the home in Felbridge Avenue.
A spokesman for Harrow police said: "Whilst searching for some suspects for an unrelated crime about a month ago, a NPAS (National Police Air Service) police helicopter crew identified a heat source coming from a house in Felbridge Avenue.
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"Officers obtained a warrant and on [Tuesday morning, March 6] executed the warrant.
"One man was arrested at the scene on suspicion of cultivation of cannabis.
"Over 400 plants found inside with a street value of £450,000."
NPAS confirmed a helicopter crew assisted police officers during the operation.
Belmont Safer Neighbourhood Team tweeted that they also helped Harrow's response team with the drugs warrant.
They tweeted: "One male arrested and over 400 cannabis plants seized."
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