Get it replaced ASAP. You must have valid ID to enter the festival. This isn’t just a ticketing requirement, it’s a legal requirement. Even with a valid ticket, you will not be admitted without ID. Please be advised that Splendour is an ALL AGES EVENT. However a valid ID will be required for everyone.
A valid ID is a current photo driver's license, Proof of Age Card or a current, valid passport. For over 18s, student ID cards do not qualify, nor do household bills or letters. For under 18s who don’t have a driver's license or a current, valid passport we will also accept a copy of your birth certificate PLUS one of the following: a student ID card; a bus pass; a bank account statement in your name.