Police raided 54 Poplar Road, Sutton, and found £195,230 of skunk cannabis money hidden in the attic.
They also found two counting machines which linked the network back to money launderer Asim Bashir.
When police looked at internal clocks in the machines they showed 510,000 notes had been counted in six months - an estimated £10.2m.
For more see www.surreycomet.co.uk/operationkarnak
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