Police investigating the poisoning of an ex-Russian spy and his daughter have appealed for witnesses who saw the pair's red BMW car before the attack.
Sergei Skripal, 66, and Yulia, 33, parked the vehicle in Salisbury city centre - less than three hours before they were found slumped on a bench.
It comes as a deadline looms for Moscow to explain how a Russia-made nerve agent was used in the 4 March incident.
Theresa May is due to speak to Donald Trump about the case.