BANNED!
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...
BANNED!
Flag poles greater than 1m in length and flares. Bottles, glass vessels, cans, flasks. http://www.wembleystadium.com/plan-your-visit/stadium-guide/rules-and-regulations