Judging by what's been happening around school today [Checked journals and saw what was happening with the kids around campus] I imagine it'll only be a few hours before you're returned home anyway. Besides, the 'anti-electric' field extends quite a few miles around the school and there's only the one train that heads to London... which only runs occasionally. Though I guess you could use the Fl- No, it should be solved in a few hours. These things never last long.

Now sit and wait.

[Gets water.]