Child Protection Policy: Never be behind a closed door alone with a child. Leave the door open.
Fire Safety Policy: All doors must auto-close. Never wedge a door open.
Now, you can get around the two above by installing full- or half-glass doors. However, since the school is a listed historic building, we would then be in violation of planning law by changing historic original features.
So it's a lovely log-jam of competing regulations. Which would you choose to violate, in order to simply do your day's work?