Yes, unless you are in a stewarding role.
You are invited to enjoy a drink while working your festival sessions, within moderation. You will be entitled to help yourself to the range of drinks on offer while your shift lasts.
You must ensure you do not become intoxicated to the extent that you are unable to carry out your duties. When your shift ends, your free drink period will also end.
During set up and take down the site is ‘dry’, while work is being done.