More than 100 children a week are contacting the ChildLine helpline with worries about their parents' drinking or drug use, according to the NSPCC.

It said in the year to March, 5,700 children had called to talk about the problems, which the charity described as a "ticking timebomb" in their lives.

Two-thirds of those callers had mentioned their parents' drinking.

The children calling about that issue were also more likely than other child callers to report abuse, it added.