The Child Exploitation and Online Protection Centre estimates there are about 300 child trafficking victims in the UK every year.

BBC: Human trafficking to UK 'rising'

The head of the Child Exploitation and Online Protection Centre, Peter Davies, said the response from the public had been unprecedented.

BBC: Jimmy Savile

Child Exploitation and Online Protection Centre is part of UK policing and aims to track down offenders and bring them to account.

BBC: Groomed and raped girls ask who can we turn to?

The button, aimed at children and teenagers, will report abuse to the UK Child Exploitation and Online Protection Centre (Ceop) and Facebook.

BBC: Facebook unveils child safety 'panic button'

Jim Gamble, head of the Child Exploitation and Online Protection Centre (CEOP), said young people must learn how to stay safe on the web.

BBC: Children at risk of web predators

However, Leicestershire Police said it did not endorse such tactics and urged people with suspicions of child abuse to contact police, Crimestoppers or the Child Exploitation and Online Protection Centre (CEOP).

BBC: 'Vigilante' parents confront online paedophiles

"When we searched Ian Frost's home in 2006, we found a huge server sat in the lounge and soon realised it wasn't a routine investigation and contacted Ceops (Child Exploitation and Online Protection Centre), " he said.

BBC: Lincolnshire paedophile ring's web server dimmed lights

The Child Exploitation and Online Protection (CEOP) Centre has created the film to warn about putting video content on sites like Youtube.

BBC: Film warning to teenagers posting sexual content online