‘We have a fundamental issue in the UK that there are many parents who choose for whatever reason to allow it,’ he told the communications committee of the House of Lords.
‘They know their children are on Facebook. Often they have helped their children get on to Facebook. That is very, very hard, when that happens, for us to know that person is not the age they say they are.’
Mr Milner said Facebook knew many under-13s were using its service but warned there was no easy solution. ‘When millions of parents are making that decision, how can we enforce it?’ he said.