>> Around 250 detectives have trawled through more than 11,000 hours of CCTV.>> That is what it took to identify who carried out the novichok attack. Now the UK government has released a timeline showing how, through the movements of these two Russian men, named as Alexander Petrov and Ruslan Boshirov.
March the 2nd, 2018, two days before the poisoning, they flew from Moscow to London's Gatwick Airport using genuine Russian passports. From there, they traveled to Victoria Station in the City Center. Police say between 6 PM and 7 PM, they were near another big station, Waterloo. They then stayed at a hotel in the east of the city, where police later found traces of novichok in their hotel room.
The following day, they traveled by train to Salisbury, arriving at 2:25 PM and returning to London less than two hours later. Police say they are certain this was a reconnaissance trip. On March the 4th, the day of the poisoning, they returned to Salisbury, leaving their hotel at around 8 AM.
CCTV footage showed the men in the vicinity of Sergei Skripal's house, where it's believed they contaminated the front door with novichok. The Skripals were found slumped on a park bench at 4:15 that day. The two men left Salisbury in the afternoon, traveling to Heathrow Airport via London. By 11:30 PM, they were on a flight back to Moscow and out of Britain's reach.