Throw money at the problem... oh no - wait up....
"The fact is building and operating a nationwide network requires huge capital expenditure..."
In our limited understanding of the network side of things it does seem to us that enough has been ploughed in already. This being so, one might think that such protocols would have been in place as part of the standard package perhaps, or at the least been factored into the acceptance and testing regime prior to overall commissioning in the field.
At the consumer level we pay top dollar for MVP kit and services that are fun and shiny but which have apparently poor resilience when put under modest stress.
At both the network and consumer level, vendors have eschewed the need for decent local/offline fallbacks which would provide much needed continuity in such events; they have sacrificed this irritating niggle at the altar of The Cloud. A prime example of this was 'exposed' in this particular outage: According the Beeb some plumber was unable to use their satnav - presumably Google Maps or the like - to get to jobs.
Seems the smart device era aint so smart after all.