Watch Cannabis: Britain’s Secret Farms now!

In 2002, Britain produced 15 per cent of its own cannabis. In 2010 that figure is 90 per cent, and police around the country raid at least three factories every day. Organised gangs are cashing in on widespread demand for cannabis among Britain's youth by setting up sophisticated factories in suburban homes and disused warehouses. Research shows a third of the UK's 15-year-olds have tried cannabis and a quarter of young people aged 16-24 smoke it regularly.