Iran's ambassador to the United Kingdom, Hamid Baeidinejad, says the husband of a dual national, British-Iranian woman jailed in Iran has blocked the doorway to the embassy.

Nazanin Zaghari-Ratcliffe's husband, Richard, spent Saturday night in a tent near the embassy in Kensigton, London in solidarity with her wife who went on hunger strike on the same day at Evin Prison in Tehran.

Nazanin has been in jail in Tehran since April 2016 when Iranian security agents prevented her and her daughter from flying back to London at the end of a visit to Iran.

On Saturday, a small group of human rights activists celebrated Ratcliffes' daughters' fifth birthday in front of the embassy. The emotional scene aired on many TV networks across the globe must have embarrassed the ambassador whose doorway is clear in all the footages aired.

Television news on Sunday morning showed Mr. Ratcliffe, sitting next to a green tent with another man in a safe distance from the doorway, and the embassy did not seem to be busy.

Zaghari-Ratcliffe has denied the charges of espionage brought against her by the Iranian Judiciary. International human rights watchdogs have repeatedly condemned Nazanin's "unfair trial" and criticized Iran for holding her behind bars for no real reason or concrete accusation.