I'd love to know! I just hope that TfW haven't been stupid and used the same seats in First as in Standard like GA did on their 745s. If they have then it will be one of the few mistakes made by ordering their new fleet, its pretty good mostly.
The 745 first class is a complete sham - far more so than the oft-complained about 80x first. That said, the GA MK3s they replaced had a cruddy first class too. The armchairs didn't recline, mandated anyone over 5"10 to slouch, and they only represented 4/5 of the seats in first class - the other fifth was 376-style seating at the carriage ends and randomly scattered in the middle of the saloon! 376 seats as First Class!
A key point here is that 197 First Class customers will have no previous expectations as they're not used to First Class on the route, unless they've recently become accustomed to it on Holyhead Cardiff, in which case let's hope the seats aren't much less comfortable than those on the MK4s. Not as hard a challenge as it would have been several years ago, mind you. They were great under LNER but on TfW the lack of the headrest has really reduced their comfort, the reclines are largely broken and the black leather looks very tired.