Jeremy Corbyn is to bring his UK tour of marginal constituencies to Scotland next month, where he is targeting up to 18 SNP seats.

The Labour leader is keeping his party on an election footing in case Theresa May's minority government collapses and another election is called.

Of the 64 seats Labour needs to win to secure a parliamentary majority, 18 - more than a quarter - are in Scotland.

Mr Corbyn will hold a series of campaign events over five days in August, speaking to thousands of voters in seats where SNP MPs have wafer-thin majorities.

These includes Glasgow South West, Glasgow East, Airdrie and Shotts, Lanark and Hamilton East, Motherwell and Wishaw, Inverclyde and Dunfermline and West Fife, where swings of less than 1% are required for Labour to win.

A further 10 central belt constituencies would require swings of between 1.4% and 3.6%, while the Western Isles would take a swing of 3.4% to change hands.

The party already holds seven seats north of the border, after it surpassed expectations in last month's snap election.

It held onto Ian Murray's Edinburgh South constituency, and won a further six seats held by the SNP.

Mr Corbyn said: "Labour remains on an election footing as a government-in-waiting, ready to end failed austerity and ensure that Scotland has the resources it needs to provide the public services its people deserve.

"Unlike the SNP and the Tories, Labour will transform our economy through investment, insisting that the true wealth creators - that means all of us - benefit from it.

"The only way to remove the Conservatives from Downing Street, and have a government that works for the many, not the few, is to back Labour in Scotland."

Scottish Labour leader Kezia Dugdale said: "The Labour Party is growing, with more members signing up every day. We continue to offer hope with our radical policies to transform Scotland as part of our pro-UK, anti-austerity message.

"I look forward to joining Jeremy in August as we take our message to the people of Scotland."

Ms Dugdale has been running her own summer campaign in Scotland under the banner "for the many" - a slogan aligned with UK Labour's own key election message.

The Campaign for Socialism, the left-leaning group within Scottish Labour, has called for an even greater change of emphasis north of the border.

It claims that Ms Dugdale's party held back the UK-wide Labour effort in last month's election, stifling the so-called "Corbyn effect".

During the campaign, the Scottish leader insisted she had faith in Mr Corbyn, despite backing Owen Smith during last year's leadership challenge.

A Campaign for Socialism spokesman said: "In Scotland we looked more like Jim Murphy's Labour Party than Jeremy Corbyn's - and that isn't a good look.

"We need to change - but that's more about changing emphasis than leadership. Jeremy has put Labour on the path to government across the UK because 'for the many, not the few' is a message that resonates, it's one that Scottish Labour needs to send."

An SNP spokesman said: ''On Mr Corbyn's trip north, perhaps he can discuss all the policy differences with the head of his Scottish branch office - such as Trident renewal. That is, if they are on speaking terms.''