Why do you think the British police are under any obligation to prove anything to you? Their obligation is to the safety of the British public.
The British police version right now is Skipral and his daughter was poisoned between 12 noon and 1 pm at home.
The evidence right now though shows they left home at 9 am and never returned home.
The British police then released CTV of the men walking on a road near their home? If the claim is these men headed to the Skipral home, sprayed this stuff on the door and left.
How do you prove the Skipral and his daughter were indeed poisoned at home you release CTV of their car traveling home between 12am and 1pm that a very convincing case the Skiprals were poisoned at home.
The British police and media are overlooking that the Skiprals were spotted between 1 pm and 4 pm at pubs and restaurants perfectly fine and eating their supper. How long does it take for this nerve agent to kick in? Three hours is a long time for it to work, it just doesn't add up.