Should there be an overhaul of the emergency plans? If trains are at a standstill by the two hour mark for whatever reason, start thinking about moving trains with handsignalmen or any other means as close to the nearest station or egress point and get people off. One thing the railway is rife with is the utter inability to make a decision, because of the blame culture and tit for tat arguing twixt the many organisations. There really needs to be someone, or some department, who can look at the situation and say "RIGHT. We are going to do THIS, NOW. Get me Strike Command!". Maybe not the last part, mind.
The next question is "Does today's railway have the resources for a robust emergency plan?". There are no spare locomotives for thunderbird duties. I seriously doubt the infrastructure staffing levels can allow a squadron deployment of handsignalmen, pilotmen and MOM's to an area affected by signalling failure. Trains are largely incompatible outside of individual classes for emergency movements of failures. Even emergency couplers are usually "For fitters use only", which means a man in a van travelling from who knows where to God knows where during any kind of traffic to fit this piece of equipment, which will then lead to a 5mph crawl to the nearest out of the way place. More delays, more time.
Gone are the days of buckeye/screw couplings, a main res pipe and a brake pipe on just about any vehicle. For a failure, get nearly anything local (EMU, DMU, loco, anything) and as long as you've got the brake, drag on.
NR are cutting back on staff. MOM's have been slashed, and a smaller number cover a larger local area. Even PWay are losing staff.
With the scant resources and the upsurge in cable theft leading to more and more delays, and recent high profile traction failures leaving people stranded on stock with no power, maybe the TOC's should seriously start looking at their routes, stock and locations and thinking about evacuation plans.