Re: The encryption horse is free
"Of mainstream apps, only WhatsApp would be completely banned"
Did you join up today to astro-turf on behalf of the Home Office?
Lets look at what you forgot:
Placing orders online with Amazon, eBay, Tesco etc etc.
Paying for anything via PayPal
Securely sending your password to your email provider to get your mail
Logging into pretty well any other service.
All these things require end-to-end encryption between one user (the customer) and another (the service provider) in order to work securely. If you don't thing this security is important then I challenge you to post all the IDs and passwords that you use for such services here in public.
But first, have a look at the T&Cs of these services. You'll find every one requires you to keep this information confidential. Your government wants to make it impossible for you to abide by those.
And for what? For nothing as far as the stated purpose is concerned. Because any organisation that wants to use encryption to facilitate law breaking is concerned will source encrypted communications from outside the government's remit. The only ones to suffer will be law-abiding citizens.