Announcement made... Also, I do think that it would be very foolish to assume that this has not happened before and that there have not been student riots before. Hence my comment about the security team being posted around the edge of the field.<br/><br/>Any other teacher wanting a "bicycle tyre" like Celia's, should simply summon a security guard to bring them one, as I imagine they would be carrying enough for each teacher to have one, and keep their own!