To ask the Scottish Government, further to the answer to question S6W-16276 by Kevin Stewart on 6 April 2023, in which it refers to the publication of the outline business case for the Aberdeen to Central belt rail enhancement project as planned for “later this year”, for what reason the publication has been delayed from 2022; what stage in the process of preparing the business case has been reached to date, and by what specific date later in 2023 it will be published.