A total of 641 of the 643 MPs who sit in the Commons have personally signed up to the International Holocaust Remembrance Alliance (IHRA) definition of antisemitism in what has been called "largest collective parliamentary support for any non-parliamentary document in modern times".

The Antisemitism Policy Trust invited candidates from all parties to sign up to the definition during the General Election campaign last year, and around 700 did so.

After around 230 of them were elected, and the All-Party Parliamentary Group (APPG) Against Antisemitism then set out to sign up more MPs to the defintion.

"The result was 637 parliamentarians personally signed up to the definition in what is believed to be the largest collective parliamentary support for any non-parliamentary document in modern times," the Antisemitism Policy Trust, which provides the secretariat for the APPG, said.

All SNP, SDLP, Green Party, DUP, and independent MPs signed. Labour MP Yasmin Qureshi signed it after this article went live as did Conservative MP Sir Christopher Chope

Those who have not signed are the seven Sinn Fein MPs who abstain from taking their seats and Labour MPs Tahir Ali and Grahame Morris.

The Trust said this was "despite repeated attempts to contact them".

The IHRA definition has been adopted by the UK government and the Labour Party - though only after a protracted row over the examples it provides of how criticism of Israel can veer into antisemitism.

Communities Secretary Robert Jenrick said on Tuesday that universities and councils that refuse to adopt the definition are to be listed and could have their funding cut.

He said that only 136 of the 343 councils in England had agreed to accept the IHRA definition when dealing with allegations of antisemitism.