I worked out, based on information on Scot-rail.co.uk, that the following rush hour services would be reduced in length (plus there are also some off-peak services affected, but that's unlikely to make any difference). Both of these have been confirmed anecdotally be members on Scot-rail.co.uk, and from what I hear it is not a pretty sight!
07:37 2L07 Larkhall-Dalmuir (GW085)
07:39 2F17 Coatbridge Central-Milngavie (GW082)
16:42 2L26 Milngavie-Larkhall (GW085)
17:34 1B08 Anderston-Lanark (GW082)
This accounts for the two units currently sitting in Bathgate LMD doing... well, nothing. I would suggest to avoid 2F17 and 2L26 for the time being; I don't know enough about the others.
There's also another unit going for training between Airdrie and Bathgate, but that's still in regular service. Apparently, it's diagram GW131 that will be removed. However, I don't have up to date diagrams for that. My best guess is that the following services will be de-strengthened once testing resumes between Airdrie and Bathgate, however I can't guarantee that this will be the case.
07:47 2G10 Gourock-Glasgow Central (a08:30)
16:18 2T05 Glasgow Central-Largs
I have no experience of either train, and I couldn't tell you what effect this will have. That said, IU doubt 2G10 will be an enjoyable journey if indeed it is de-strengthened.
AIUI, one there's enough 380s in service (which should only be a few weeks from what I understand; rail-britain will probably be able to give a better estimate), then this will release enough 334s from the Ayrshire/Inverclyde route to re-strengthen these services.
PS, I've never spoken to a season ticket before. I'm quite surprised at just how well a sheet of paper is able to type
