Did the Scottish Government spend £700,000 sending out SNP 'propaganda'?

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The National
Did the Scottish Government spend £700,000 sending out SNP ‘propaganda’?

“SNP blunder as £700k spent on ‘political propaganda’ thank-you letters” – Daily Express headline, January 25, 2021

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The National
Did the Scottish Government spend £700,000 sending out SNP ‘propaganda’?