Please be aware that Skiddle don't run the doors at the event so we’re unable to give you a definitive answer to this question.
Whether you'll require ID or not varies from event to event, so you'll need to check with the organisers. Your best bet is to check on Skiddle, the official event website or the event organisers Facebook.
If you’re still unsure then you can contact the organisers directly.
Note: If the event is for over 18s only, a passport or driver's license is the usual provision.