Douglas Oakervee review of HS2: EIR release

• According to the Greengauge 21 document 'High-Speed Rail and Scotland' [May 2020 (https://www.rail-leaders.com/wp-content/uploads/High-Speed-Rail-and-Scotland.pdf)
• Transport Scotland made a submission to the Douglas Oakervee review of HS2, and this included proposals for new rail lines south of Glasgow, represented as 'vectors'.
• Assuming that is true, I would like to request:

1. the documents making up Transport Scotland's submission to the Douglas Oakervee review of HS2

2. other documentation held regarding the proposals for new rail lines south of Glasgow including the cost benefit analysis.

As the Transport Scotland submission to Oakervee does not seem to feature on the Transport Scotland website, I would also like to know:

3. how Greengauge 21 knew about it.