A Greek national has been charged with assisting a foreign intelligence service linked to Iran.

Ioannis Aidinidis, 46, was charged on Friday under the National Security Act after an investigation by Counter Terrorism Policing (CTP) London.

The Met said Aidinidis is accused of helping an intelligence service "believed to be Iran" by "targeting of a UK-based journalist working for Iran International".

Aidinidis, who lives in Munich, Germany, is due to appear at Westminster Magistrates' court on Friday.

He has been in custody since his arrest in West Sussex on 16 May.

"We know this may cause concern for many people here in the UK, and particularly those working in Persian-language media," Commander Helen Flanagan, head of CTP London, said.

She added that the force was providing advice and security support to a number of organisations and individuals, including "the specific individual and organisation linked to this investigation".

Police said there was not believed to be a wider threat to the public.

In April, three people were charged over an attempted arson attack on the offices of Iran International in north-west London.

An Islamist group with possible links to Iran - Harakat Ashab al-Yamin al-Islamiya - claimed responsibility for the attack. The claim has not been substantiated.

In a statement last month, Iran International said it had been subject to a "campaign of transnational intimidation aimed at silencing independent journalism".

Police officers are seen at Lewes Street in Brighton wearing gas masks and protective clothing.

The doctor, who was working at the time, is recovering after being attacked with a knife on Tuesday.

A murder investigation opens over a teenager stabbed to death after a house party on Monday.

The force said the move would help people understand the "very challenging role" police carry out.

Worboys is serving a life sentence for sexual offences he committed between 2000 and 2008.