On the water storage point, I have wondered why this isn't really a building regs matter? Isn't one obvious way of doing this with a cold water storage tank which was a tradition feature of British plumbing? I think they aren't that popular these days. Should they be compulsory?
sorry, but the British government now apparently envisages a scenario that would require me to keep forty eight litres of drinking water in my house for emergencies? oh right I’ll just shove it in the reservoir I’ve got in the back bedroom then