Am guessing it is to protect staff. It is the council/safety group introducing it - Covid measure to try to prevent any searches of people or bags.I cannot work out how this has anything to do with Covid?
At a stretch I'd maybe say rifling through the contents of a bag which may have covid particle on them, but then we're letting in people who may be positive anyway? Seems an odd one.
I was wondering about this whether different councils/SAGS will bring in different measures around the country. Best to keep our ears to the ground before travelling.