Continuity mistake: In the flashback at the end of the episode, one of the shots is of Will kicking the door shut in Mrs Springett's face. The sound of her scream is quite different in the flashback to how it was in the original identical shot.
Continuity mistake: When Neil turns to see the man at the window he has toast up by his mouth. When he completes the turn the toast is nowhere in sight. (00:19:45)
Answer: Jay, Si and Will steal Simons dad booze as they are planning on meeting Carly later on and have lost their own supply when kicked out of Neil's place by his dad after being caught and insulted.