Police seized £30,000 worth of cannabis from a house that had been turned into a “huge” factory after a tip off from residents.

Officers raided the property in Harwood Hall Lane, Upminster, on Friday.

Sgt Ken McNish said: “The place had been turned into a cannabis factory. It was huge, one of the biggest ones we have seen. The extraction fan was huge and piping had been fitted to take the smell away.”

Inquiries are ongoing but no arrests have been made.