Sergei Skripal and his daughter Yulia were found unconscious on a park bench in Salisbury in broad daylight – a discovery which reverberated around the world.
It transpired they had been poisoned by the nerve agent Novichok and world leaders blamed Russia for the attempted assassination of Mr Skripal, a former Russian spy living in England, and his daughter who was visiting from Russia.
A multi-million security operation had the quaint Wiltshire city of Salisbury on lockdown for weeks as experts combed for clues and made sure any trace of the lethal poison was disposed of.
The Government laid into The Kremlin, and Prime Minister Theresa May imposed sanctions on Moscow, expelling a host of diplomats…