Police are believed to have identified the suspected perpetrators of the Novichok attack on Sergei and Yulia Skripal in Salisbury, the Press Association says.
Theresa May is preparing to face questions from MPs about her decision to launch air strikes against military targets in Syria alongside the US and France.
At least 70 people, mostly women and children, have been killed in a suspected chemical attack in Douma, the last rebel-held enclave in Syria’s Eastern Ghouta, rescuers and medics say.
Nerve agents were discovered by accident in the 1930s.
The UK would find it difficult to refuse a call from the US to join military strikes on Syria, Boris Johnson has said.