Officers came across the farm concealed within Haliburton House in Hall Street South, West Bromwich − a Victorian industrial building dating back to the 1870s that was previously home to a metal manufacturing firm.
Cannabis plants were found across all three floors, the loft space and the clock tower along with an extensive heating, lighting and hydroponics set-up.
Thousands of plants, many approaching maturity and harvest ready, were being cultivated throughout the Grade II listed property.
And it’s estimated the crop was worth up to £3million.
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