" As it is none stop Ealing - Birmingham it’s missing a beat ."
That's the point - no-stop ...... Rail planners often moan that they introduce new trains & kit to speed things up and then intermediate stops howl until they 're connected - thus negating the advantages o the original idea.
IIRC the original W region Intercity 125 service was supposed to be London - Bristol and London Cardiff non-stop - but then they added Bath, Swindon, Reading.........