UK/EU citizens do not need a visa for Belize, but these things can change. So please click here and check out the current situation. Make sure you find out whether or not you need a visa at least a month before departure so you do not run out of time.
If you need a visa, please contact your nearest Belize embassy (unless you use a visa service). Shoestring does not organise your visa. You are responsible for having a valid passport and visa when you travel. You can also obtain the visa through a specialised visa agency such as www.travcour.com.
Your passport should be valid for a min. 6 months from your date of return.