A team of up to four spies including a woman are claimed to have been sent to murder double agent Sergei Skripal and his daughter Yulia – two agents to carry and administer the Novichok and two more as back up in case their comrades fell ill or failed…

The team fled to Heathrow where they are believed to have flown to Moscow on an Aeroflot jet on March 5 – 30 hours after they arrived – shunning the usual circuitous spy route home via an airport in the Mediterranean, Scandinavia, Switzerland or Turkey…

An Aeroflot flight that landed in London on March 30 was boarded by UK’s border force for a ‘routine’ search – but MailOnline has studied its flight data and can reveal this is the same plane that may have carried the assassins home on March 5…

Spooks also know the ‘fresh identities’ used to get back to Russia after cross-referencing their passport aliases with the commercial flight’s manifest.