That was six years ago, when they were in Salisbury District Hospital in March 2018. Now, prevented from testifying in public at the public inquiry under way in London, they are still incommunicado, either in prison or dead.
Reminds me of the funny pharmacology of Navalny's poisoning, according to the chemist that got crank called by Navalny & Bellingcat in that CNN documentary. The chemist said he smeared 10x the lethal dose in his blue underwear's waistband yet it took an hour to take effect & he survived throughout the entire duration of the emergency landing at Omsk plus ambulance ride.