We have back up UPS for wifi, 240v inverter to power lights, small Tv or radio, gas lamps, camping gas stove, gas BBQ, torches in every room etc.
The power break affected 439 homes in a very large rural area which is served by one network mast. Sadly after about an hour this mast ran out of power and the networks covering our area failed. Apparently the mast will only last about 1 - 2 hours depending on usage before it runs out of power. That means no internet, no phones etc. and you cannot communicate with emergency services.
Brazen thieves could in full view of yourself steal your car, break into home while you are there, steal your goods etc and you cannot phone the police because the landlines have been removed by BT. I wonder if the government thought of this when pushing for landlines etc to be dumped?