One thousand cannabis farms have been raised by West Midlands Police in the last 18 months - an average of 3 or 4 a day.
The latest raid was of a Warehouse in West Bromwich containing a thousand plants with a potential street value of £500,000.
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West Midlands weather: A chance of some patchy rain during the night, with mist and fog in places.
East Midlands weather: Any showers will die away during the evening to leave a night with some mist and fog patches.
As the annual Shrewsbury Folk Festival gets under way, thousands of people are expected to come and soak up the atmosphere.