Yet again, you’re making the wrong assumption.
People are not criticising the fact that services have been canned where essential.
Most of the anger is directed at Preston - Carlisle and other, unaffected (or lesser affected) parts of Scotland which do not at all justify the level of service cuts seen.
You have repeated this a few times in the thread , and whilst from what I gather this is your primary concern , some posters did and continue to question the decision in areas that have faced extremely challenging conditions today . Some even made laughable comments about front line staff being in the wrong job if they cant go out in a bit of extreme weather .
As for Avanti and to a lesser extent TPE . I totally agree that they need a better contingency when things like this happen . Although TPE at least did run about half of their services to Carlisle not sure on their capacity to run much more than this without their glasgow traincrew
For Avanti their traincrew route knowledge situation is more restrictive so I think a sensible contingency would be to split the trains and turn back everything at Preston . Then running whatever they can North as a shuttle .
Contingency plans are however also not a catch all , every situation is going to be different , prime example if the line is properly shut they might have units stranded and so ability to run the above mentioned plan is impacted. What is a better siuation is to have adequate skillful controllers working in well staffed control centres backed by competent on call management to support when necessary in situations like this .
These situations are often fluid and those in control charged with making those decisions have to react dynamically to the situation on the ground as it develops . In my experience at a few TOC's as well I know that currently staff shortages in those control functions are just as acute as with traincrew and can severely impact the ability to make these decisions and have them communicated out (internally let alone externally) . The same Morale issues effecting traincrew goodwill are also present in the back office functions at many TOC's including control , planning even some management to a degree .
The other problem is the difficulty recruiting road transport if the train plan falls to pieces .This evidenced and subject of discussion in a long thread on this forum , obviously getting road transport in the area experiencing the severe weather is a non starter , but road transport is often recruited from such wide areas these days as well meaning many of the usual options might be in areas effected by severe weather .