Five kilos of opium with a street value of £50,000 has been seized by Hammersmith and Fulham Police.
Following a seven-month operation, officers from the Hammersmith & Fulham drug squad and payback unit arrested a 48-year-old male in the process of importing five kilos of opium with a street value of £50,000 pounds.
The Iranian man who lived in Hammersmith was detained and arrested by officers last Monday at St Pancras International Station on the return leg of a day trip to Brussels.
When searched officers recovered the opium, which was concealed within a body belt around his waist.
Intelligence suggested that the Class A controlled drug was destined for the streets of Hammersmith & Fulham.
The following day the man appeared at Uxbridge Magistrates Court where he was remanded in custody.
Detective Sergeant Simon Rogers from the Hammersmith & Fulham Police Drugs Squad said: "This is a fantastic result which ended months of hard work and commitment by my team.
"The operation highlights the complex investigations that my officers are involved with, and will serve to show the community how committed we are in the fight against drugs."
Hammersmith and Fulham's cabinet member for crime councillor Greg Smith said he wanted to congratulate all the officers involved.
He added: "Drugs are an evil which destroy lives and are the root cause of many other crimes.
Hammersmith and Fulham Council will continue to do all it can to work with and support the Police in the war against drugs and drug dealers."
The police liased with customs officer during the operation.