Cocaine with an estimated street value of �3million was seized from a cargo ship docked at the Thames Refinery in Silvertown, it has emerged.

The 30kg haul was discovered during a routine search of the vessel on June 11. It had sailed from Brazil with a cargo of raw cane sugar.

An investigation is currently under way but no arrests have been made.

Dean Milton, from the UK Border Force, added: “As this detection shows, our officers are on constant alert to keep drugs, other smuggled goods and illegal persons out of the UK.

“We are determined to prevent this terrible trade which can have such a destructive impact on the lives of so many.”