In 2026, Eurostar maintains strict security protocols similar to air travel to ensure passenger safety across the Channel. You are strictly prohibited from carrying unlicensed firearms, replicas, imitation weapons, and all forms of explosives, including fireworks and flares. Sharp objects with blades longer than 3 inches (in the UK) or 77mm (in France) are banned, as are all flick-knives and daggers. Notably, camping gas or butane cylinders are forbidden regardless of quantity. While you can bring small amounts of alcohol for personal consumption, Eurostar reserves the right to confiscate "excessive" amounts. Items like furniture and motorized scooters (excluding mobility aids) are also restricted. Always check current customs regulations for food, as post-Brexit rules in 2026 continue to limit the transport of certain meat and dairy products from the UK into the EU.