I saw the tweet in question - it's wrong.
Just to build on a post I stuck in a different thread recently...
From December the plan is to use:
Cl 802: LIV - EDB, MIA - NCL
Cl 397: MIA - EDB, MIA - GLC, LIV - GLC
MkVa: LIV - SCA
Cl 185: MIA - CLE, MAN - HUL, MIA - MBR, MAN - HUD, HUD - LDS
Quickly throwing some numbers out, if you made all workings that are to remain as Cl185 (excluding stoppers) up to 6 cars, you’d need:
10 units for HUL - MAN
+ 14 units for CLE - MIA
+ 14 units for MBR - MIA (to Redcar)
+ 2 units for MAN - HUD stopper
+ 2 units for LDS - HUD stopper
= 42 Units
Given the hand back of the Class 350s and any potential infant mortality of the new trains, there is merit for TPE to keep all 51 Cl185s for the time being.
Early next year 6 out of 7 MBR-MIA diagrams will become Mk5a, theoretically releasing 12 units, this should then create a daily diagram surplus of 21 units.
Once Platform 0 is completed at Leeds and the stoppers are rejoined at HUD, they will be able to run as 6 car sets.
Then there’s the potential of the Liverpool - Nottingham services...
+ 14 units for LIV - NOT
= 48 units
You're then left with 3 'spare' units. Once you factor in appropriate maintenance regimes which would most likely involve some off-peak 3 car running, it's clear that there is a very workable case for keeping them all!
Don't believe everything you read on Twitter, folks!