I am in a European country that has been effectively closed down the last week already.
The list of key workers is similar to what the Uk has listed above.
However, in reality it doesn't mean that everyone from those sectors is still working.
Ie if you're an electrician, only a few are kept on a rota for emergencies, there is no general routine electric work being done in homes or buildng sites etc. its probably 5% of electricians Max
If you work in a school, its really a skeleton crew. No secretaries, no music, sport, art teachers etc. Just enough to keep an eye on kids while they play, no actual teaching is being done. They are recording who is in each school the first few days, then combining any. In reality, nobody is using this facility. In our area, roughly size of say Devon, yesterday 180 children were registered across the entire district. So only roughly 1 in 50 odd schools are now open, and from next week they will condense again. Most only have 1-2 pupils.
Same with all sectors. Post offices, most village ones or nearby ones are closed, just one per 'large area' remains open. all town halls, law courts, councils etc are physically closed, there is just a skeleton crew in the offices you can reach on phone in emergencies. Transport, well most are running on a limited sunday service, so only 1/3 if that staff needed. Same i assume in Uk as have already seen 40 odd tube stations in london have closed, and from next week most general trains and buses will run reduced.
Any 'tech' jobs are all from home 99% of the time.
So basically, the list is broad, but in reality, no one wants to send kids to school if not 100% needed, and most people on the jobs list above will be filtered down to just minimum needed in buildings/offices, and the rest working from home