The House of Commons standards watchdog has been asked to investigate the expenses of two SNP MPs caught up in an alleged love triangle.

Scottish Conservative deputy leader Jackson Carlaw has written to the Kathryn Hudson, the Parliamentary Commissioner for Standards, asking her to look into claims from Angus MacNeil and Stewart Hosie.

Read more: SNP love triangle: party says claims about Angus MacNeil's expenses are 'totally wrong'

It follows reports that Mr MacNeil stayed in the Park Plaza hotel in London’s Waterloo with freelance journalist Serena Cowdy while they were having an affair.

The Herald:

Mr Carlaw said: “The SNP says there is no financial impropriety - but at the same time, it is widely reported that Angus MacNeil stayed with Ms Cowdy at a hotel in London and put the bill on expenses.

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“The best course of action is for the UK Parliament's Standards Commissioner to look into the matter, which is why we are writing to the Commissioner this morning calling for an investigation.”

The SNP said that an suggestions of "financial impropriety" by an SNP MP were "totally wrong".

SNP sources said that overnight guests staying in MPs’ hotel rooms did not incur any extra cost to the taxpayer.

A party source added that MPs are not required to register guests with the Independent Parliamentary Standards Authority, the body set up to scrutinise MPs’ expenses after the 2009 scandal.