sanitizor bottles on the wall next to classroom doors? squirt and rub on arrival and leaving?
Have you not been in any shops yet where this is what you do?
So, someone needs to pay for it and procure it - is government going to do this? How many classrooms in every secondary school? That's a lot of bottles of sanitizer at £30 a go.
Then you've got to have someone supervising it to make sure it's not squirted out all over the floor, drunk or stolen (as happened in hospitals that I've worked at - both drunk and stolen).