THE number of children calling ChildLine to confide in a counsellor about their parents' drinking and drug abuse has doubled in the past year.

The 24-hour helpline received 5323 calls - more than 100 a week - from children scared by their parents' behaviour, a staggering rise on the 2509 calls it fielded the year before. Just under 1000 counselling sessions (956) were carried out by staff based at centres in Glasgow and Aberdeen.

Most of the children turning to the NSPCC-run service were between the ages of 12 and 15, but a substantial minority - one in 10 - were aged 11 or under and still at primary school.

In a stark warning, the charity said thousands of children live in fear of their parents' anger, with one in six saying they had fallen victim to physical violence by their mum or dad when they were under the influence.

Many children are being forced to live in dirty and even dangerous surroundings and lack many essentials including having enough to eat and clean clothes to wear because household money is spent on booze, the charity warned.

Tom Rahilly, head of services for families that are affected by alcohol and drugs at the NSPCC, said: "What we hear from children is that they are concerned that their parents are using drugs or alcohol to blot out worries about jobs, money or housing."