This is just an admin/rules question - not remotely a criticism of schools closing.
DD1's primary school closes for polling day. Obviously with the general election just announced they will need to be closed on 4th July. So that's a day that is being lost, but my understanding is they have to be open a set number of days per school year? So what do they do here? Obviously no one can answer what our specific school will do but generally, are they expected to just suck it up and lose a half term day? Finish for summer a day later? Or for situations like this does the requirement to be open a set number of days get waived? Or will some schools have been keeping a day in hand because they knew this was a possibility?