Paul Cosford, director of health protection at Public Health England said: "All known first responders have been contacted through their organisations and encouraged to seek further advice should they experience any symptoms".
Furthermore, we could refuse to send the Russians an Easter card or we could cut back on our vodka consumption on weekdays, not including holidays, obviously.
"A boycott of the World Cup is definitely one of the options on the cards", the defense source told the daily. Dr. Jenny Harries of Public Health England said at a news conference.
Investigators are reported to have found traces of a chemical weapon in one part of the restaurant premises.
Treasury chief Philip Hammond added his voice Sunday to the chorus of senior British figures vowing that strong steps will be taken if a foreign government is found to be responsible. Hammond says that restricted Britain's ability to respond to future economic shocks.
Taken together these measures would go some way towards the "whole of government response" that ministers have been talking about.
It's too soon to conclude whether the former Russian double agent Sergei Skripal and his daughter Yulia are Moscow's latest overseas victims.
The Bishop of Salisbury, the Right Reverend Nicholas Holtam, said the attack on Skripal and his daughter was a "violation" of the city.
"I'm in shock. She often came to Moscow and she returned here because her boyfriend was here", she said.
But considering that his son in law had to essentially give away close to $2 billion worth of shares when he broke up with Putin's daughter, it is safe to assume his real worth is massively more than this.
If the theory of Russian revenge and message sending is correct, it raises difficult questions for British intelligence.
"You need to understand, he's a former spy and he's a traitor".
'The police have said that if anybody thinks they have any additional information they would welcome them coming forward.
Earlier on Saturday, specialist military help was used to remove vehicles and objects from scenes across Salisbury amid fears of contamination.
But says some people are concerned prolonged exposure may, over weeks, cause health problems.
Authorities haven't revealed how or where the Skripals were exposed to the nerve agent.
They are in a critical but stable condition in Salisbury District Hospital. -Sgt. Nick Bailey had visited Sergei Skripal's home after the discovery of the pair in the centre of the cathedral town.
British police have identified more than 200 witnesses and are looking at more than 240 pieces of evidence.
The reassurances did not completely calm the concerns in Salisbury. Some 250 counterterrorism officers have been investigating the attack, assisted by British military personnel.
Some visitors remained cautious.
She told Sky News: "It's been very quiet around the Maltings".
Anyone who was in The Mill pub between 1.30pm last Sunday and 11.10pm on Monday, or the nearby Zizzi restaurant between 1.30pm on Sunday and 9pm on Monday, are urged to follow the advice. People can get their hands on this sort of thing.
Police have cordoned off Skripal's modest home in Salisbury, about 130 km from London, and erected forensic tents in the garden.
Suspicion is mounting that Russia carried out the attempt on their lives as an act of revenge against the former intelligence officer, who was convicted in 2006 of selling state secrets to MI6.
He said that the Kremlin had developed a much more aggressive posture towards the UK in the past 12 months and the country should not sit submissively by. He was jailed for treason in 2006 but freed in 2010, in the biggest spy swap since the Cold War.