Apparently there are "robust" conversations ongoing at Transport Scotland.
As many contributors will be aware, stock availability is going to hit crisis point in Scotland in the very near future as a consquence of the end of lease of some of their 170 stock.
Abelio are already pre-apologising in the Scottish press for the predicted short-forming of services on the Glasgow/Edinburgh to Dunblane/Alloa routes.
Essentially, there are two factions.
Those who see the refurbished D78 units as having potential for releasing units from the far North line and Kyle line and other low-speed services.
Those who abhor the thought of "London's cast-offs" being used in Scotland and would rather votres in Central Scotaldn facing cancelled services.
This is going to be interesting.
The other option could be to find other TOC's with more suitable routes for the D78's and encourage them to release their DMU's for others to use.
If a 3 coach D78 has comparable loading capacity to a 2 coach DMU with 2 coaches but is the same cost (i.e. the D78's are 2/3rds the cost to lease) then many TOC's would stick with a uniform fleet if they could.
However, if DMU supply becomes more of a problem then the ROSCO's may put their lease costs up and/or a TOC may offer more to ensure that they have the trains they need. If this happens then the D78's may look a good prospect.
DRS would probably be happy to run it given their current progress in that field... if they had the stock that is! Mind you, they've got plenty of 37s and 68s suitable for it, and if it was looking likely, it wouldn't be hard or take long for them to source more Mk 2s.