cannabis with a street value of £2 million has been seized, with police citing an increase in smaller personal and larger professional operations, run by organised gangs harvesting from huge factories.
The true extent of the battle facing officers was revealed as they made their latest raid on a house in Durham Street off Holderness Road yesterday, recovering about 400 plants worth more than £100,000.
Sergeant Mick Stevenson, from the city's community reassurance team, said the number of raids they are carrying out has increased significantly.
"We are now carrying out raids every day," he told the Mail.
"It is getting busier and we will carry on disrupting these operations, which are being run by people who know what they are doing – they are professional, organised criminal gangs.
"To set up a factory like the one on Durham Street would cost in the region of £20,000."
Mr Stevenson also revealed a haul of 1,691 plants found in a house in Spring Bank, west Hull, in March has since been reclassified by the Forensic Science Service as being a super-potent strain of the drug, with a street value of more than £1 million – twice that of early estimates.
He also praised the public, saying fed-up residents were now calling in with intelligence about the large-scale operations with greater regularity.
Mr Stevenson said: "Maybe people are deciding to grow more themselves on an individual basis, but there are also more professional operations.
"We are here to disrupt the factories by seizing evidence and destroying the set-ups, but there are detectives working at the next level to track down the people running the show.
"However, I think the public should be given a lot of credit here because they give us the intelligence we need to crack down on these operations."
Yesterday's was the fourth major raid and established cannabis factory uncovered in the city by police this year.
Officers found the Spring Bank farm in March then seized 401 cannabis plants last month, with an estimated street value of £250,000, from a former wood yard in New Bridge Road, east Hull.
Police said that was the biggest haul in east Hull for many years.
Just three days after, neighbourhood police officers on patrol stumbled across a huge cannabis factory at a derelict property in Linnaeus Street.
Mr Stevenson said: "We get the big hauls like Durham Street, but also others of maybe 30 or 40 plants.
"I would ask anyone who suspects there may be a cannabis factory near them to contact us. It is neighbourhood intelligence that is helping us disrupt this activity and we need people to keep passing that on to us."
Long Van Nguyen, 30, and a 17-year-old, who cannot be named for legal reasons, have admitted cultivating the cannabis in the house in Spring Bank.
The men, both from Vietnam, are waiting sentence.
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