Schedule 4 of the Direction to Aircraft Operators, Aerodrome Managers, Security Approved Air Cargo Agents and Catering Undertakings Relating to Heightened Security Measures 2001 states that the following items shall not be permitted in the handbaggage or on the person of any passenger or member of flight crew (except as may be reasonably required for the performance of their normal in-flight duties):
- Toy or replica guns (plastic or metal)
- Catapults
- Household cutlery
- Knives with blades of any length, including letter openers, made of metal or any other material eg polycarbonate or ceramic, strong enough to be used as a potential weapon
- Razor blades (both open bladed and safety razors)
- Tradesmen's tools which would have the potential to be used as an effective weapon
- Darts
- Scissors
- Hypodermic syringes (unless required for genuine medical reasons)
- Knitting needles
- Large sporting bats and clubs (eg baseball and softball bats, golf clubs)
- Billiard, snooker or pool cues
- Any other article which in the reasonable contemplation of the aerodrome manager or aircraft operator might be used or adapted for causing injury or incapacitation of a person.
So there you go!