Former Whitehall adviser Patrick Rock has been bailed to appear at Westminster Magistrates Court on July 3 after he was charged over child abuse images.
Judith Reed, a senior lawyer with the CPS Organised Crime Division, said: "We have determined that there is sufficient evidence for a realistic prospect of conviction and that a prosecution is in the public interest."
More top news
A British violin teacher facing extradition over allegations of abuse has been found dead at his home in the US.
Two actors have been killed after a 'fake' rifle exploded on stage during a live performance of a play in southern Italy.
Kim Davis denies the licences to same-sex couples in defiance of a Supreme Court ruling earlier this year.