Officers from both sides of the border believe they have smashed an alleged drug gang responsible for bringing 200 kilos of heroin into Scotland in just seven months.
The drugs are reported to have an estimated street value of Â£16 million.
Officers from Strathclyde Police and the North West Organised Crime Unit, Titan, carried out a series of raids on properties in Glasgow on October 30 â€“ arresting seven men.
It is alleged that the gang have their roots in Merseyside and raids were also made on homes in the area earlier in October.
It has been reported that Op Blenheim has uncovered a multi-million pound drugs conspiracy where leaders imported heroin from the fields of Afghanistan before sending it to Scotland from Merseyside.
Eight men have been charged with conspiracy to supply Class A drugs, seven of whom are from Scotland. Another man from Liverpool faces the same charge, and a man and a woman are to appear in court in Scotland charged under the Misuse of Drugs Act.
It is understood that the Scottish Crime and Drug Enforcement Agency also helped supply intelligence on the case.