EXCLUSIVE: Alexander Petrov and Ruslan Boshirov seen on CCTV

This is the astonishing moment the two Russian novichok assassins casually window-shopped in Salisbury just minutes after they tried to murder former double agent Sergei Skripal and his daughter. The first footage seen of the killers, obtained exclusively by MailOnline, shows the two men looking relaxed and good-humoured as they sauntered down the street towards Salisbury station to make their getaway. Dressed in winter clothing, Alexander Petrov and Ruslan Boshirov are seen walking past the Dauwalders rare