Specialist drugs officers discovered 484 cannabis plants, worth £90,000, in the detached home in Gull Road, Guyhirn.

They swooped on the property at 9am following a painstaking surveillance operation over several days.

Each room in the five or six bed home was found to be littered with cannabis plants, in a range of growth stages, with two rooms on the ground floor and more upstairs being used to cultivate the drug.

Equipment used to grow the drug was also found in the home, where only the bathroom, kitchen and one bedroom were not being used to produce the Class C drug.

DS Sean Spencer, of the divisional crime and drugs unit, said: "It's one of the biggest seizures we have made in the Fenland area.

"It just shows that we are out there and will do whatever we can to find these types of operations."

Before officers could begin to examine the house, electric wiring, which had been tampered with to provide lighting and heat for the cannabis plants had to be made safe.

The raid came after days of surveillance which began after a passing police officer became suspicious about the house.

Yesterday's raid follows an incident last year where an industrial unit at Honeysome Road, in Chatteris, was raided and police seized 819 plants, drug cultivating equipment, ammunition and of cash.

Following the raid, DS Spencer urged members of the public to keep an eye out for unusual activity near homes which might indicate that cannabis plants were being grown.

He said that large numbers of cannabis plants gave off a particular smell odour which could be smelt outside a building.

A man in his 30s was arrested yesterday on suspicion of cannabis production and was taken to Huntingdon Police Station.