“It’s not normal, frankly, for governments to do things like this or for politicians to talk about it.

"But I think the scale of the problem now is big, and it’s a really big problem for a lot of teenagers and we need to address it.”

NSPCC research shows the problem is not just confined to girls, with 16% of boys also reporting they have experienced some form of sexual violence from a boyfriend or girlfriend.

It found the highest proportion of sexual abuse – 66% – is perpetrated by young people under the age of 18.

The adverts are aimed at 13 to 18-year-olds and feature a teenage girl being coerced into sex by a boy as a party goes on downstairs.

The girl says “I don’t want to”, but the boy persists.

A double of the boy then appears, watching the scene from behind an invisible wall.

The viewer is asked “If you could see yourself, would you see rape?”

The adverts will run for a month on youth TV channels, starting tonight, during programmes such as E4’s Skins.

The schoolgirls said they had been impressed with the advert.