Episode #2.3 - S2-E3
Plot hole: Miss Summers tells her class that they have the afternoon off school due to an emergency staff meeting. Penny and Suzi leave the room with the other pupils, Miss Summers stays sitting at her desk. As the two girls are walking down the corridor out of school they stop outside the room that the meeting is in to listen. Miss Summers opens the door and tells them to go away - how did she get to the meeting when she was still sitting at her desk when Penny and Suzi left the room?