Poisoned

Guardian UK: Woman in Russian spy mystery is Sergei Skripal's daughter - Yulia Skripal, 33, discovered next to her father on bench in Salisbury, is in critical condition

Skripal was one of four Russians exchanged for 10 deep cover “sleeper” agents planted by Moscow in the US in 2010. For more than five years he has been living quietly – though not hidden – in a modern red-brick home close to the city centre.