The scene takes place in a post office, where an old lady tells a bemused-looking police officer that she wishes to buy two first class stamps, and report a terrorist bomb plot. The humour comes from the incongruous juxtaposition of the two ideas.
• Send a letter and file a crime report (Mail Online)
• Police in post offices as Scotland Yard axes 65 stations across London (The Guardian)
• Victims 'could report crimes at the Post Office' (Daily Telegraph)