A prison chef who smuggled drugs and mobile phones into jail, and sold them to a prisoner, has himself been locked up.

Mick Fray, 46, of Clifton Road, South Norwood, charged between £200 and £300 in return for smuggling the contraband into HMP Isis, in Greenwich, for 23-year-old Glen Lawrence.

Lawrence - who was saving up to buy a caravan to live in upon release - then sold the illegal goods on to other prisoners at inflated prices.

The pair discussed their plot in a derivative of Shelta - a language used by Irish travellers - to evade detection.

Lawrence's sister, Nikki Nash, 25, and mum Carolyn Dylan, 46, both of Muswell Hill, also took part in the scheme, supplying Fray with phones and cannabis.

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Glen Lawrence

Fray would then sell the goods to Lawrence behind bars, who could make between £250 and £500 for each phone and four times the street value of the cannabis.

In October 2011, after Fray stopped co-operating, the three family members hatched a plot to continue smuggling goods through other prisoners' visitors.

They were caught after Nash left 11.9g of cannabis, worth £480 behind bars, in a toilet in the prison's public area. It was meant to be picked up by another visitor but was discovered by security guards.

Two weeks later Fray and Nash were arrested by officers from the Metropolitan Police prison corruption unit.

Dyan was arrested in January and Lawrence was arrested in March.

All four were sentenced at Southwark Crown Court today.

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Nikki Nash

Fray was jailed for four-and-a-half years after being found guilty of conspiracy to supply cannabis, conspiracy to bring a prohibited item into prison, misconduct in public office and transmission from within a prison without authority.

Lawrence's sentence was extended for four-and-a-half years after he was found guilty of conspiracy to supply cannabis, conspiracy to bring a prohibited item into prison and transmission from within a prison without authority.

Dylan was jailed for two years for conspiracy to supply cannabis and conspiracy to bring a prohibited item into prison.

Nash, who pleaded guilty to the same charges in November, was handed a suspended 15-month jail term and a 12-month supervision order. Judges also ordered her to complete a women's domestic violence course and carry out 100 hours unpaid work.

DC Kevin Gow, of the Met Police's anti-prison corruption unit, said: "Fray abused a position of great trust. He had responsibility for supervising up to 30 prisoners at a time in the kitchen and, with exception to the cells, he had full key-access within the prison.

"What makes his part in the conspiracy even more grave is the fact that when mobile phones are used by prisoners, it is often to help commit crimes such as drug trafficking, witness and victim harassment, and even murder.

"We have stopped this smuggling racket by working very closely with HM Prison Service, with whom we will continue to investigate prison officials who think they can get away with corrupt behaviour."