There's really nothing to panic about.
No DBS because they will be supervised at all times - this isn't new, has always been the rule. Otherwise parents evenings etc could never happen.
Supervision from SLT and support staff who won't be doing extra hours, they are just being re-directed. Not ideal as their roles are important, but so is this.
People being recruited are largely from the families of the staff and children we teach - people who have lost their jobs this year, uni students who aren't going back until late Jan or Feb.
The only time it will take away from teaching staff is the time it takes to test them twice a week. Totalling around 10 mins in theory.
The purpose of this is to identify and isolate cases immediately so the rest can get on with getting an education. We could pick holes without offering a solution, sure - or how about we get behind it and see if it has the desired effect?