Amy's prison visits restricted after husband 'fails drug test'

Now she will only be able to see him from behind a glass screen instead of the "no strings" visits previously allowed.

Fielder-Civil, 25, is being held in Pentonville as he awaits trial for assault and trial-fixing allegations.

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He tested positive for a Class A substance, thought to be heroin.

Winehouse, 24, has not been to see him since the random test last week.

On December 18, Winehouse herself was arrested in relation to Fielder-Civil's case.

It is understood that Winehouse was questioned over accusations that she was aware of a plan to derail the GBH case against her Fielder-Civil.

She has been bailed until March, when she is expected to return to an east London police station.

Fielder-Civil and Michael Brown are accused of assaulting James King, the landlord of Macbeths pub in Hoxton, east London, on June 20 last year.

It is alleged that they later conspired to pervert the course of justice by offering Mr King a significant amount of money - reported to be £200,000 plus £10,000 costs - to withdraw his allegation and flee to Spain until the case collapsed.

Two other men also facing the same charge are Anthony Kelly, 25, from Chalk Farm, north west London, and James King, 36, from Risley, Derbyshire.

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2007 has been a tough year for the Back to Black singer.

Winehouse dumped her chef boyfriend Alex Claire in March and reunited with her ex-boyfriend Fielder-Civil days later.

The pair shocked friends and family when they wed in Miami, Florida in May.

Since their marriage, the couple's health appears to have deteriorated rapidly.

In August, Winehouse cancelled her tour, citing "health issues", amid reports she and Fielder-Civil had checked into rehab over their alleged drug troubles.

Two months later, the couple was arrested in Norway on suspicion of possession of marijuana. They were later released and fined £350.

Since Fielder-Civil's imprisonment in November, Winehouse's emotional state seems to have deteriorated rapidly.

She has been photographed drinking in the early hours of the morning and wandering around dressed in her bra and jeans at 5.45am in the morning on December 2.

Her father Mitch and mother Janice have spoken of their concern for their daughter, but insist their attempts to help her have been knocked back.

Last week, Mitch said: "Believe me, my first instinct is to get hold of her, pick her up and take her back to my house and lock her away.

"But I've spoken to the finest drug counsellors in the world, and they've said that is exactly the wrong thing to do."