Schools haven't started in England. What is the problem with giving more guidance the week before they go back?!
If you are the person who writes all the risk assessments for an educational establishment on multiple sites and ensures that all necessary safety measures are put in place (as what is MEANT to be a tiny, sub 1% of your job-type role), and have worked insane hours since March, then it makes a HUGE difference.
Every fine nuance of every document needs to be read.
Every implication for every existing risk assessment needs to be decided.
Every document needs to be re-written, consulted on and the distributed to all the right people.
Every physical change (for example for music and drama), every piece of signage and every chair / desk / tape marking that needs to be changed has to be decided on and communicated to site staff (now off until Tuesday)..
BEFORE TUESDAY MORNING, so that every member of staff can take on their roles confidently to ensure students are as safe as they can be.