The cost of two rival exercises to sound opinion on how Scotland should be governed has now passed the £1 million mark, it has emerged.
The SNP said the cost of the Calman Commission, set up by Westminster to improve the running of devolution, had now been confirmed as £613,400.
Meanwhile, the Scottish Government's own "national conversation" on the country's constitutional future cost the taxpayer £464,000 up to the beginning of the year.