Traces of the nerve agent used to poison former Russian spy Sergei Skirpal and his daughter Yulia has been discovered at the Zizzi restaurant where they last ate, police have said.
"The two victims remain in hospital and they're critical but stable", Rudd told reporters after chairing a meeting of the government's Cobra security committee.
Some lawmakers and a former top law enforcement official say the nerve agent attack fits a pattern of suspicious deaths in the U.K. and in the United States.
"As the Roman, in days of old, held himself free from indignity, when he could say civis Romanus sum [I am a Roman citizen]; so also a British subject, in whatever land he may be, shall feel confident that the watchful eye and the strong arm of England will protect him against injustice and wrong", he said. This precautionary advice is for those who visited The Mill pub in Salisbury between 13:30 hours on Sunday 4th March and closing time at 23:10 hours on Monday 5th March 2018 or the nearby Zizzi restaurant between 13:30 hours on Sunday 4th March and closing time at 21:00 hours on Monday 5th March 2018.
Additional reporting from Newsy affiliate CNN. Both victims remain unconscious and in a life-threatening condition.
Hundreds of pub-goers and diners have been told to wash possessions as a precaution after nerve agent traces were found.
In 1850 Lord Palmerston, then foreign secretary, stood before the House of Commons and enunciated the principle of universal protection for British citizens everywhere, in the teeth of continental and Ottoman absolutism.
"But if there is the flexibility, the space to do something, then we will decide in the autumn how to do that", he said, adding the government would continue to balance the need for investment against the push to bring down public debt levels.
Taken together these measures would go some way towards the "whole of government response" that ministers have been talking about.
"A boycott of the World Cup is definitely one of the options on the cards", a defence source said last night.
Russian court officials at the time said he'd received at least $100,000 for his work for MI6, the British intelligence service. "Even in difficult times, they always had smiles and pleasant faces, not grumpy".
"It's really important to understand the general public should not be concerned, " Jenny Harries of Public Health England said at a news conference after the release of the leaflet, according to the AP.
Russian Foreign Minister Sergei Lavrov dismissed Britain's warnings of retaliation were propaganda and not serious. Police used tear gas and threw stun grenades at the anarchists, who also barricaded themselves at the University of Thessaloniki.
Rudd revealed the investigation in the case has now become a massive operation involving more than 250 counter terrorism police officers. "This is dishonest, this is pure propaganda, pure fanning of hysterics and hysteria".