The UK Border Agency has seized heroin and cocaine worth £6,560,000 at Harwich.
The drugs were recovered from a trailer that arrived at the port on a ferry from the Netherlands on December 14. Border Agency officers found that 44 kg of heroin and 36 kg of cocaine were hidden in boxes containing specialist medical equipment.
"This is the second significant drugs detection the UK Border Agency has made at Harwich in the last four weeks. These successes have prevented illegal drugs worth more than £10.5 million hitting British streets," Bill Form, assistant director for the UK Border Agency at Harwich, said in a statement.
He said, "Our officers work round the clock and use the latest technology to stop illegal drugs from entering the country. Our activity at the borders protects our towns and cities from the harm that drugs cause to communities."
Earlier, the officers seized heroin, cocaine, amphetamine and cannabis worth £4.1 million that had been hidden which carried Christmas decorations.
Meanwhile, a 47-year old Dutch national was arrested in connection with the latest detection. However, he has now been released on bail pending further investigation.