A licensed premises which sells or supplies alcohol needs a Designated Premises Supervisor (DPS).
There can only be one DPS per premises. The DPS takes responsibility for what happens at the premises, although does not need to be there at all times.
To become a DPS, you must first hold a valid personal licence. You then must be nominated by the premises license holder and complete a consent form. The consent form is part of the online application for a premises licence.