Cold Enough for Snow (Pudding Bag School)

When the children are snowed in during a dinner ladies' detention for what could turn into weeks, things look bad. After all, dinner ladies are not overly fond of children, and their cooking is terrible! Now London has been evacuated, and time and food are running out. Bagdemagus, the magical school cat, is behaving very strangely - can he help the children make their escape?