Thanks for the well-meaning advice.

The recovery password in iCloud to stop even Apple accessing it is exactly what the UK is trying to undermine. It protects you - for now.

I tried to start using pgp for email years ago, the problem is of course adoption by everyone you're communicating with, be that personal, corporate or official. I got one friend to make a gpg key! And most email servers, as I understand, pass to each other with TLS, and the connection from your computer to your email service is encrypted. The problem is the emails at rest on both ends, including hosted by the email provider. Moving my email off Fastmail, whether to something like Protonmail or stored only on my computer, would remove one particular attack surface.