I find the whole CFR thing the most stressful as when you're looking at experts predicting millions will catch something even a small difference in % makes a huge difference in the number of deaths.
If 60% of the UK caught it with 1% CFR = 420k
If it's 2.5% = 1.05 million
For scale an average seasonal flu here is 17,000 (but ranges from 1,800 to 28,000 over the last 5 years).
When you look at these figures you start to appreciate why, even if your individual risk is low, this is something to genuinely be concerned about.
Also departments have to plan for the reasonable worst case scenario which I guess is 3% ish hence why they're planning potential morgues in tents in Hyde Park for example...but this doesn't mean they'll need them.
That being said I think 1% would be a pretty good outcome and I'm not that optimistic about that at the moment if the Govt are doing nothing to delay the spread (and so avoid health care overwhelm).