Re: No thanks
When did you last lose your POTS phone for more than an hour and/or your Broadband for more than an hour? and/or your Mobile Phone for more than an hour?
i.e. All at once, so you wouldn't be able to make an emergency call?
You seem to be crying wolf regarding a scenario that didn't happen with Manchester bombing, didn't happen with Grenfell and didn't happen with the London bridge attacks.
I'm not saying it can't happen but there is a lot of resilience in place, on all network types, nowadays.