people who can't work from home can still go to work if they have a choice and their employer allows it
Now, I understood it completely differently, ie My understanding is Stay at home. unless you are a key worker, or shopping for essentials (ie food / pharmacy), or taking exercise once a day. To do otherwise is enforceable by the police, and I have to say that this seemed absolutely crystal clear to me, no ambiguity, no negotiation, crystal clear.
If numpties try to claim they are key workers when they are clearly not, on their heads be it.