61653 HTAFC
Veteran Member
It wasn't me that brought the 222s up- personally the last time I was on one, the shocking state of the interiors was far more of a concern than any ride quality issues.Not my experience of Mk4s, the few trips I had were very pleasant but that was back in GNER days. GW HSTs usually felt great as long as you were ditting down.
These 222 "vibrations", what sort of period/frequency are you talking about?
On the ECML the mk4s always felt a bit rocky at high speeds to me especially southbound when being propelled, certainly not as smooth as the HSTs.