The offences took place in 2013 and 2014 involving the transfer and concealment of large sums of cash.
The investigation included police witnessing the exchange of a Marks and Spencer carrier bag containing thousands of pounds of cash at Euston station.
Tommy Adams (59) was sentenced to seven years in jail for his role in laundering a total estimated to be as much as £250,000. His children admitted fraud charges in a separate trial.
Shaun Adams (32) admitted fabricating a wage slip for his sister Terri (35) to get a mortgage. He was given a suspended six-month jail term for one charge of transferring criminal property.
According to reports, the gang, which included two of Terry Adams’ closest associates and six other participants, was sentenced to more than 30 years in jail at Woolwich Crown Court.
Police had bugged the Andrews Café in Holborn to catch Terry Adams discussing his plans and also targeted the Camden Cab Company which helped to transport the cash.