A man from Harlow in Essex has been charged with assisting the Russian intelligence service.
Howard Phillips, 64, has been remanded in police custody and it is expected to appear at Westminster Magistrates’ Court later this afternoon.
He was arrested on 16 May in central London and was detained under section 27 of the National Security Act.
Phillip’s arrest is not connected to any other recent charges under the act or investigations under the act.
The Metropolitan Police said in a statement that they believe there is no wider threat to the public over the matter.
Officers also searched addresses in Hertfordshire and Essex as part of the investigation. Both searches are now complete.