This is really bad news for cyclists as the cycle provision on the new trains is absolutely dire and far far worst than the 125s. Cramped, often full of luggage even if you have booked a bike space, awkward or impossible to get in to, only one or two small bikes in each area so far fewer spaces than on the 125s. Really really poor design.
The govt are having a consultation/review – details here https://www.cyclinguk.org/article/bad-train-trip-share-your-experiences-taking-bikes-trains