carried out the attack, they would have been at the Skripal front door shortly after noon.

Where were the Skripals at this time?

Sergei Skripal’s BMW was seen out and about in the city at about 9.15am on the Sunday. It was spotted heading from the area where he lived towards the city again at 1.30pm and Sergei and Yulia arrived at the Maltings car park in the city centre at 1.40pm. It may be that when the suspects applied novichok to his front door, he and Yulia were at home.

Where did the suspects go after allegedly sabotaging the Skripal front door?

They certainly did not return directly to the station. About an hour after the attack, at 1.05pm, they were in the city centre on Fisherton Street. The police havenot given details of how they got there. They could have got there by retracing their steps back past the station and on into the city. Or they might have taken a less obvious route that involves walking alongside a riverside path known to have been frequented by Charlie Rowley, who was poisoned having found a bottle containing novichok at the end of June. There is another 42-minute gap in the timeline the police provided between when the pair were seen in Fisherton Street and when CCTV footage picked them up at the station. The suspects are not likely to have been walking around randomly – after all the police have said they carried out a reconnaissance mission the day before.

Did the suspects dump the fake perfume bottle