The numbers of people viewing online child sex abuse images in the UK amount to a “social emergency”, says the NSPCC.
A report by the charity suggests the number of individuals looking at such images could exceed half a million.
It is calling for a “robust action plan” to cut off the supply of content.
The Home Office says it is working with law enforcers, companies and voluntary organisations to stamp out online child exploitation.
In the past five years the number of offences recorded by police of viewing child sexual abuse images under the Obscene Publications Act has more than doubled across the UK, reaching a total of 8,745 in 2015.
But the NSPCC believes the true scale of offending in the UK to be far greater.
Read more on the BBC News Website