Jeremy Corbyn was accused of "appeasement" towards Russia as MPs - including his own backbenchers - voiced anger at the Labour leader's apparent reluctance to directly blame Moscow for the Salisbury nerve agent attack.

Mr Corbyn was heckled in the House of Commons on Wednesday as he responded to the Prime Minister's statement setting out a range of retaliatory measures the UK will take against Russia.

The Labour leader described the Salisbury attack as an "appalling act of violence", but urged the Government to ensure its response is "decisive, proportionate and based on clear evidence".

Mr Corbyn also called on Theresa May to maintain "robust dialogue" with Russia, despite her announcement that high-level bilateral contacts are to be suspended.

However, the Labour leader drew ire for failing to explicitly back the Prime Minister's assertion of Russian responsibility for the attack.


Corbyn jeered over Russia in the Commons

Repeating Moscow's demands, he also asked whether Mrs May had accepted the Russian government's request for them to be handed a sample of the nerve agent, in order for them to run their own tests.

Mr Corbyn was then barracked from the Conservative benches for using the exchanges - in which MPs largely supported Mrs May's response to what she branded an "unlawful use of force by the Russian state against the UK" - to suggest the UK's diplomatic capacity has been reduced as a result of cuts.

The PM said: "This is not a question of our diplomacy, of what diplomatic support we have around the world.

"This is the question of the culpability of the Russian state for an act on our soil."

Earlier this week, Mr Corbyn was accused of failing to offer unity and of party political point-scoring in the wake of the Salisbury attack, after he highlighted Russia-linked donations to the Conservative Party.

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Mrs May went on to criticise Mr Corbyn's response to her statement, claiming he "could have taken the opportunity - as the UK Government has done - to condemn the culpability of the Russian state".

A number of high-profile Labour backbenchers then voiced their own disapproval with their party leader's comments.

"Can I assure the Prime Minister that most of us on these benches fully support the action she is taking," said former Labour cabinet minister Ben Bradshaw.

Labour's Yvette Cooper, chair of the Home Affairs Select Committee, was cheered by MPs on all sides of the chamber when she said Russia's actions should be met with "unequivocal condemnation".

The PM, in her response, thanked Ms Cooper for the tone of her comments and acknowledged they were "representative of many" on the Labour benches.

Submitted EDM 1071 with Labour colleagues making clear we unequivocally accept Russia’s culpability in the Salisbury attack and support UK govt action. Others will have chance to sign in coming days. pic.twitter.com/H0wMBZBcKe — John Woodcock (@JWoodcockMP) March 14, 2018

Further criticism came from the DUP's Sammy Wilson. He said: "We welcome the decisive action that has been taken by the Prime Minister today and it sits in contrast with the policy of appeasement that we have heard from the frontbench of the Labour Party."

In a briefing with journalists after Mrs May's statement, a Labour spokesman said: "Jeremy has condemned the attack in unequivocal terms."

But, the spokesman refused to say whether Mr Corbyn accepted Russia was at fault, adding: "The Government has access to information and intelligence on this matter which others don't.

"However, also there is a history in relation to weapons of mass destruction and intelligence which is problematic, to put it mildly.

"So, I think the right approach is to seek the evidence to follow international treaties, particularly in relation to prohibitive chemical weapons."

The spokesman went on to say "we have no problem with the expulsion of spies" after Mrs May announced she will be kicking out 23 Russian diplomats who have been identified as undeclared intelligence officers.

But the spokesman said such moves risk starting a "tit for tat" response and that measures to "hit them in the pocket" would be more effective.

Asked whether Russia should have been given more time to provide an explanation for the use of a military-grade nerve agent in Salisbury, the spokesman said: "Strict procedures are set out by the Office for the Prohibition of Chemical Weapons.

"There are strict protocols that must be followed now, but we cannot accept any kind of outrage of this kind on UK soil."

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His comments prompted anger from Labour MPs, with Chuka Umunna saying they "do not represent the views of the majority of our voters, members or MPs".

Another Labour MP told Sky News there was "sheer fury" at Mr Corbyn's response.

They said: "He has been briefed on privy council terms. What more evidence does he require?"

There were also signs of uneasiness within Mr Corbyn's frontbench team.

Asked by Sky News whether they were happy with the Labour leader's response, one member of the shadow cabinet said: "I could not possibly comment."

Meanwhile, fellow Labour backbencher John Woodcock - a regular critic of Mr Corbyn - revealed he is gathering signatures for a parliamentary motion among Labour MPs, to make it clear they "unequivocally accept Russia's culpabililty in the Salisbury attack" and support the Government's actions.

An image of the Early Day Motion revealed Mr Woodcock had already attracted the support of 15 other MPs.