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Two charged after police discover Hertfordshire's biggest cannabis factory

The cannabis factory had an annual crop thought to be worth £1.5m. Credit: Hertfordshire Police

Police have discovered Hertfordshire's biggest ever cannabis factory - with 1,300 plants and seven growing rooms.

The factory was found in a unit at Woodside Industrial Park in Letchworth Garden City after a tip-off from members of the public.

The value of the annual crop is thought to be around £1.5m.

Police made the discovery during a 24-hour operation. It was concealed behind false walls alongside a living area and drying room.

They have since been destroyed.

Ba-van Nguyen, 20, of no fixed address, has been arrested and charged with being concerned in the production of a controlled drug.

A 16-year-old boy was also arrested and charged with being concerned in the production of a controlled drug.

The plants were spread across seven growing rooms. Credit: Hertfordshire Police

This is a great result and an excellent example of just how key the public are in helping us to tackle drug crime in the county.

My team and I find it very satisfying to know we have prevented such a large amount of drugs from being sold on the streets.

– Sgt Richard Balderstone

Police say the public should look out for the following signs of cannabis being grown in communities:

  • A strong and sickly sweet smell
  • Lighting and ventilation equipment being taken into the house
  • Windows always covered or blocked off
  • People coming and going at all hours or neighbours you never see
  • Strong and constant lighting at all hours
  • High levels of condensation
  • Constant buzz of ventilation equipment
  • Lots of power cables around the property