https://twitter.com/TrainsHb/status/1724445329724985455 found this tweet, it gives a very good insight into the interiors, and finer details such as labeling, reservation displays, and... most importantly... legroom. Interestingly, first class has a different design of table to the Pendolino's, omitting the plugs and USBs in favor of them being on the seats themselves, though still retaining wireless charging.