Theresa May, who was prime minister at the time of the attack, recalls when she first heard about the Salisbury poisonings.

Baroness May describes how it felt to stand in the House of Commons and blame the Russian state for the attack, the moment she heard that a British citizen had been killed and shares her hopes for the Dawn Sturgess Inquiry.

This episode was made by Marie Lennon, Andy Howard, Tom Ryan & Dan O’Brien.

Executive production by Mary Sanders and Naomi Wordley.