Hi welcome to the site. It's the setting's duty to protect everyone within the building and property boundary so it is also their responsibility to explain/show what's expected of everyone in order to do that. If you ask your setting/placement what would happen in these situations they'll be able to help demonstrate the procedure xx
How are people greeted when they arrive at your setting? Who finds out why they are there? What would happen if someone has no right to enter or to be present?
Trespassers on school grounds
Banning parents from school -
http://childlawadvice.org.uk/informa...hool-premises/
Hope this helps