Three nuclear submarine sailors have been kicked out of the Royal Navy after being accused of taking cocaine.
Cleaners on board the HMS Vengeance called military police after finding packets of the class-A drug lying around cabins on the Vengeance sub in June.
The submariners, who are believed to be lower ranking, then failed a compulsory drugs test (CDT) for the substance shortly after visiting a US military port in Florida in June.
All three were given their marching orders by naval chiefs following an inquiry.
Military sources said crew on the Vengeance sub are regarded as 'top flight' and that the Royal Navy has a 'zero-tolerance policy' on drugs.
The men were forced to give urine samples following shore leave in Florida.
Following an enquiry, all three were kicked out by military chiefs, the Daily Record reported.
The sub continued its top-secret operations after leaving Florida before returning to Faslane naval base on the Clyde in Scotland.
The men were taken from the vessel and were disciplined.
It’s believed the three were part of a larger group of crew members suspected of having taken cocaine during the 'run ashore'.
The other sailors in the group are understood to have passed CDTs.
The source told the Daily Record: 'Drug busts on the V fleet are rare because the submariners are considered to be the best of the best considering the job they do.
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'The men would have been celebrating being off the boat for a short time but there’s celebrating and there’s taking Class A drugs while working on a vessel that carries nuclear missiles.
'Bosses would have had no choice but to sack them. They knew the risks if they were caught but their carelessness in leaving the packets lying around has raised some eyebrows.
'The Royal Navy has a zero-tolerance policy towards drug-taking so anything like that, you’re out.'
In April, seven sailors were kicked off another Royal Navy submarine after testing positive for cocaine.
The sailors failed a compulsory drugs test the morning after they attended a drug-fuelled party, as the 5,300-ton submarine the HMS Talent was preparing for a sensitive mission to track Russian submarine movements in the North Sea and the Arctic Circle.
At the time, a Navy source told the Mail on Sunday: 'This is a major embarrassment for top brass. It takes years to train submariners to perform highly skilled and highly sensitive roles at sea and the Navy has just lost seven guys due to one night of stupidity.'
A Ministry of Defence spokesman said yesterday: “The individuals who tested positive for cocaine have now all been discharged.
'The Royal Navy will not tolerate misuse of drugs by service personnel in any form or at any time. Any personnel caught taking drugs will be discharged.
'The Naval Service maintains a comprehensive programme of compulsory random drug testing to ensure maximum deterrence.'
The Vanguard-class Vengeance is one of four vessels that carry Trident and is armed with up to eight nuclear warheads.