Is the rumour of TransPennine Express taking over the service from Liverpool to Nottingham still floating around?
A positive point would be the introduction of First Class but obviously a 3 car 185 has quite a lot less seats than a 4 car 158. I’m not sure if platform lengths would allow a six car 185?
As a user of the Sheffield-Manchester I see pros and cons of both options and Class 158 v. 185 is just part of it. Who operates them is less important to most users than them arriving on time with seats to sit on - and sometimes enough carriage space to even get aboard.
In theory TPE and EMT provide 2 fast trains an hour between Manchester and Sheffield. EMT suffers from all sorts of delays from Norwich to Liverpool. Despite several long stops for recovery their trains are frequently late.
TPE tend to be more punctual but they too can pick up delays anywhere between Cleethorpes and Manchester Airport. Consequently overcrowding can occur on any service by either operator because the later it gets the more traffic it will take from the following service.
This is frequently compounded when EMT provide a 2 coach 158 rather than the 4 planned. That train gets later and later due to the congestion until it gets so late it may be diverted round the Dore curve to miss out Sheffield completely. This causes intense irritation to passengers for Sheffield and passes the overcrowding to the following TPE service.
The TPE 185 3 car formation is currently adequate for most services, but certainly not during commuter periods. 6 carriages are to be provided by the end of the year (one commuter train in each direction already is). A refreshment trolley is provided on most services from Manchester to Doncaster but can't move down the busiest trains. As two 185s have no corridor connection between them that provision will be no better with the longer train. Short platforms require Selective Door Opening, a practice that requires the conductor to be in the right half of a 6 coach train. As with catering it seems one half will be unmanned, or extra crew will be needed.
185s have first class but the luggage space for travellers for Manchester Airport is often totally inadequate.
158s are great when a 4 car train is provided, although there is no first class. A refreshment trolley can pass right down the train and adding extra units would be a relatively simple matter (but at present they often can't find 2 158s and are adding a 156 or 153). Reversal at Sheffield and dividing the train at Nottingham can complicate a little, but it's the late running that's the Achilles heel for continuance of the full route from Liverpool to Norwich.