Historical child abuse: Whistleblowers need 'cast-iron guarantee'

Police and intelligence officers who give evidence on an alleged Westminster paedophile ring must be protected from prosecution, two Labour MPs have said.

Investigators are looking into claims that the Met covered up abuse because MPs and police officers were involved.

Speaking to the BBC, MP Simon Danczuk urged Prime Minister David Cameron to give a "cast iron guarantee of immunity" to whistleblowers as many were "very reluctant to share what they know".