Here's what the huge police investigation into the #Salisbury attack has established about the prime suspects "Petrov" and "Boshirov":
1) They flew into Gatwick at 3pm on Friday, 2 March on an Aeroflot flight from Moscow. Flight number SU2588.
2) It's believed they travelled by train into London, arriving at Victoria station at approximately 5.40pm.
3) Then they were on the London Underground to Waterloo station. They were there for an hour until 7pm. They stayed in the City Stay Hotel in Bow Road, East London, on Friday, 2 March and Saturday, 3 March.
4) Saturday 3 March: Reconnaissance operation. The pair leave the hotel and reach Waterloo station at approximately 11.45am. They get a train to Salisbury, arriving at approximately 2.25pm. They spend less than two hours in the city, leaving at 4.10pm.
5) Sunday 4 March. The attack. "Petrov" and "Boshirov" undertake the same journey from their London hotel to Salisbury, leaving Waterloo at 8.05am. CCTV shows the pair near Mr Skripal's home. And they are accused of contaminating his front door with Novichok.
6) Finally, the escape. Petrov and Boshirov returned to Waterloo Station at approximately 4.45pm. Less than two hours later they took the Underground to Heathrow and departed at 10.30pm for Moscow on Aeroflot flight SU2585.
