Michael Matheson has come under fire after racking up nearly £11,000 in data roaming fees on the device during a family holiday to Morocco last year.

Mr Matheson initially agreed to pay £3,000 towards the cost from his expenses budget, with the rest covered by the Scottish parliament.

Following a public outcry, he then agreed to foot the whole £10,935.74 from his own pocket.

The health secretary, who has an annual salary of £118,511, admitted the blunder occurred after he failed to switch over from Holyrood's old mobile contract to a new one.

The Falkirk West MSP has insisted the data use was for parliamentary business and highlighted the matter had already been investigated by parliamentary authorities.

However, it has since emerged the browsing history was reportedly not checked.

The Scottish Tories are calling on Mr Matheson to hand the iPad over to Scottish parliament IT experts to confirm if it was solely used for constituency work.

They also want Mr Matheson to make a statement to Holyrood on the matter.

Scottish Tory leader Douglas Ross said: "This scandal has dragged on for several days now and Michael Matheson is looking shiftier with each one that passes.

"He still has serious questions to answer, and suspicions will linger for as long as he fails to prove his claim that the enormous tab he expected taxpayers to foot was the product solely of parliamentary work.

"Despite his woolly words to journalists on Monday, it's clear the Scottish parliament officials have not examined the browser history of his iPad.

"That's the only way Mr Matheson's claims can be verified, so you'd think he'd be rushing to hand it over in order to prove that there was no personal usage."

Mr Matheson was the net zero, energy and transport secretary in Nicola Sturgeon's government at the time of the week-long holiday around Christmas last year.

He was appointed health secretary earlier this year under First Minister Humza Yousaf.

When announcing he intended to pay the full bill himself, Mr Matheson said he had "reflected long and hard" and accepted the SIM card should have been replaced at an earlier stage.

He added: "Much of the speculation in the past couple of days has questioned my integrity, and I take this extremely seriously."

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The Scottish parliament confirmed on Monday the iPad had been examined by a senior IT officer to ensure it was functioning properly.

The iPad's mobile data settings and data use were reviewed, but the device did not provide a "breakdown of data over a specific timeframe".

"The official observed a cumulative total, which accrues over the lifetime of the device," the spokesperson said.

Mr Ross added: "We need to get to the bottom of this saga once and for all, so the Scottish Conservatives are issuing the health secretary with an ultimatum: hand over the iPad, for the browsing history to be checked, and deliver a personal statement in parliament explaining the full circumstances or we'll table a motion of no confidence.

"This is about the integrity of a senior SNP cabinet minister.

"Twice Michael Matheson has appeared before journalists, and twice he has failed to give coherent answers to key questions. He must do so now."

A motion of no confidence requires the support of 25 MSPs to be held.

An SNP spokesperson said: "This is simply an attempt to keep a story going, days after Mr Matheson has done the right thing and agreed to foot the bill personally.

"While we are focused on crucial issues such as steering our health service through the winter, the Tories only ever want to talk about process issues."