A man from Kingsbury is among 11 men arrested on suspicion of laundering millions of pounds.
HM Revenue and Customs, which made the arrests, believes the multi-million pound alcohol and VAT fraud involved the laundering of around £50million.
Raids on 11 residential and eight business addresses included seizing computers, £400,000 in cash and personal and business records in London, Berkshire, Surrey, East Sussex and Buckinghamshire.
John Cooper, assistant director of criminal investigation at HMRC, said: “HMRC will not hesitate to investigate anyone suspected of stealing public funds and laundering the proceeds of criminal activity.
"If you have information about people who may be involved in money laundering, please call the Customs Hotline on 0800 59 5000.”
The men were interviewed by HMRC and released on bail until June 30. Investigations are ongoing.