Three fraudsters have been jailed for what is believed to be the biggest ever plot to make fake pound coins - after 50,000 false coins were found.
Kevin Fisher, 53, and Daniel Sullivan, 28, were found guilty of possessing counterfeit currency and items to make counterfeit currency.
At Southwark Crown Court they were jailed for five and seven years.
Mark Abbott, 44, of Cedars Park Drive, Edmonton, pleaded guilty to the charges and was given a two-year prison term.
'Tip of the iceberg'
The court heard Fisher, of Rags Lane in Goffs Oak, Hertfordshire, Sullivan, of Bancroft Chase in Hornchurch, east London, and Abbott were arrested during an undercover police operation in Essex last May.
Police found a storage container with 1.6 million metal discs inside and fake coins equivalent to £20,000.
Fake coins equivalent to a further £30,000 were found in a nearby car.
The Metropolitan Police said the haul was "the tip of the iceberg" and some coins might still be in circulation.
Det Insp Bruce South said: "These three men are organised criminals who were intent on undermining the UK monetary system.
"There is nothing fake about the reality they must now face of life behind bars."