A majority of Scottish Labour MSPs have called on beleaguered UK leader Jeremy Corbyn to "do the right thing" and resign.

Thirteen of the party's 24 representatives at Holyrood have signed a letter calling on Corbyn to stand down so the party can "regroup" and "once again provide effective opposition".

Among them are former Scottish party leaders Iain Gray and Johann Lamont and former MP and deputy Scottish Labour leader Anas Sarwar.

It comes after over 200 Scottish Labour members called on Corbyn to quit on Wednesday.

On Tuesday, current Scottish Labour leader Kezia Dugdale said that if she was in the same situation as Corbyn, she "would not be able to do this job effectively".

Dugdale was responding to vote of no confidence against Corbyn in the Parliamentary Labour Party (PLP) on Tuesday, which saw the motion pass by 172 votes to 40 - over 80% of Labour MPs

The statement from MSPs said: "The first duty of the Labour Party is to provide an effective voice for working people in communities, council chambers, assemblies and parliaments across the UK.

"All of us joined the Labour Party because we aspire to deliver Labour governments in Scotland and across the UK.

"As parliamentarians, and the elected representatives in a parliament representing millions of people - including Labour voters - across Scotland, we would expect any leader to reflect seriously on such a substantial vote of no confidence.

"As Kezia Dugdale rightly said, if she could not command the confidence of 80% of her Labour group then she would consider her position.

"In circumstances where a General Election may be called in the next few weeks or months, we believe that the leader of the Labour Party has to have the confidence of the MPs he leads in order to be our candidate for Prime Minister."

The letter concluded: "It is deeply regrettable that we have to make such a statement, but for the good of the party and, more importantly, the country we believe Jeremy Corbyn, who is a principled man, must do the right thing and allow the party to once again provide effective opposition and regroup as a credible party of Government."

The letter's signatories were: Jackie Baillie, Claire Baker, Claudia Beamish, Neil Bibby, Mary Fee, Iain Gray, Mark Griffin, Daniel Johnson, James Kelly, Johann Lamont, Lewis Macdonald, Anas Sarwar and Colin Smyth.

Corbyn responded to the increasing calls for him to go with a defiant statement on Thursday calling on the party to "stand together" behind his leadership.

He said: "I was elected leader of our party, for a new kind of politics, by 60% of Labour members and supporters.

"The need for that different approach now is greater than ever."