EXECUTIVES at nationalised Prestwick Airport are expecting continued multi-million pound public money support to keep it in existence while public spending auditors said it is not clear that government intervention has provided value for the taxpayer pound.

Audit Scotland has said that the Scottish Government's propping up of the airport in loans has cost the taxpayer over £31m - and that many millions more would be needed to sustain the airport as long as it remains in public hands.

Airport directors have an agreement that ministers will not seek repayment of all or part of the loan facility or the interest until at least March 31, 2024 - which directors say will enable the Ayrshire airport to "continue in operation existence for at least the next 12 months".

Financial papers seen by the Herald confirm that directors believe that support is expected to continue beyond that date "for the foreseesable future".

The losses relate to the £43.8m of public money loan support given to the airport which auditors now say are valued at just £11.6m. Loan interest was valued at £7.4m but that has been valued at 'nil'.

Ministers have so far decided not to recoup any of the £50m it is owed in loans and interest from the state-controlled airport to allow it to remain in existence which has led to concern it has sanctioned unlawful state aid.

It comes as the Auditor General Stephen Boyle told MSPs that there needed to be "improved transparency" around investments made by ministers in private companies.

And he said that there needed to be a stronger framework over the assessments made by ministers before making intervening in private companies.

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He said the auditors had a "qualified" position regarding whether the public spending in Prestwick Airport was value for money and indicated it would require a further performance audit.

Scottish Conservative shadow transport minister Graham Simpson said that ministers must recoup the money that it paid out.

He told the Public Audit Committee: " We don't have detailed insight over what comes next [with Prestwick Airport]. We know that there had been discussions to find a buyer but that has not yet come to fruition.

"So, I don't have an annualised figure in m ymind to say what the government's support will mean for Prestwick Airport.

"But you can see on an annual basis many millions of pounds of public expenditure are being used to support the airport, to sustain jobs and services within the airport. But that would have been the case for as long as it remains in public sector hands."

The airport was taken into public ownership in November 2013 after being purchased by the Scottish Government for £1.

The facility, which was put up for sale the previous year by New Zealand firm Infratil, had incurred annual losses of £2m.

Then deputy first minister Nicola Sturgeon said the deal would help protect the airport and the 1,400 jobs it supported and that work would begin for "turning Prestwick around and making it a viable enterprise".

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The Scottish Government has been trying to sell the airport but a preferred bidder pulled out of negotiations in May 2021.

Ministers then re-engaged with the second-placed bidder, but “various concerns” were identified and it was not pursued further.

It is believed the last doomed bid came from Train Alliance UK and was scuppered when it emerged that major repairs are required to the runway.

The finance secretary Kate Forbes early last year said that ministers had decided not to go ahead with selling the airport and that it was in a financially strong position.

Mr Boyle added: "We're not challenging the value that has come from the jobs. But these weren't part of the assessment at the time that the original intervention was made. That's why we are welcoming a stronger framework to make assessments of what the intended outcomes most crucially would be, and part of that is value for money.

"It's not about getting the money back. it's about when public money has been invested, that the intended outcomes are clear as to what's going to be achieved from that. These are long term commitments, taking many millions pounds of public expenditure. And really, for any investment, whether it's public sector, or private sector, when you are investing that amount, it really goes back to the business case. What do you intend to achieve from that?"

The latest financial records show that the owners and operators of Prestwick Airport made a profit of £1.2m in the year to March, 2022, down from £12.8m the previous year. It turned total losses of £19.8m over the three years between 2016/17 and 2018/19.

Mr Simpson said the extra financial support for Prestwick Airport was "supposed to be a temporary measure to protect jobs, until the SNP Government manages to find a buyer" but he added that "in practice it amounts to a loss of almost £32 million – and another £7.4 million in interest – to the taxpayer".

He added: "Since Prestwick is now actually recording profits, the Scottish Government must get its act together and seek to recoup these colossal sums.”

A Transport Scotland spokesman said: “Glasgow Prestwick Airport is operated on a commercial basis and at arm’s length from the Scottish Government. The recent performance of the business is promising and welcome, and these accounts show that the airport continues in a positive direction, posting a profit in 2021-22.

“This progress is the result of a focussed board and management team who have worked hard to control costs during the pandemic, grow revenue streams and win new business, and it’s due to the flexible and professional service provided by every member of the Prestwick team.”