From the above link,
Prohibited items,
Flag poles greater than 1m in length and flares. Bottles, glass vessels, cans, flasks.
Frisbees and similar items, dangerous or hazardous items, illegal substances, explosives or ammunition; fireworks, knives, blades or other weapons, firearms, scooters, skateboards or other skates. Laser devices, smoke canisters, signs or items with corporate or inappropriate branding, unauthorised fliers, spray paint, large industrial style “permanent“ marker pens, prams / push chairs, transmitting devices, professional cameras & recording devices (This applies to cameras that have interchangeable lenses), large suitcases, lap tops, and back packs
(trip hazards), illegal merchandise items, water bottles (need to have the ability to decant), illegal charity collection utensils, motor bike helmets, umbrellas, darts, hampers and cold boxes, air horns, alcohol and animals (except service dogs & guide dogs).