Don't know about you but my head's attached to a weird flexible thing that lets it turn through a wide angle of lateral movement, but glad to see Covid's not dampening that great British instinct to police grammar and vocab as well as the confectionary present in people's trollies!
Plain digestives and rich tea ok, nothing with topping or filling, including chipped chocolate.
You're not allowed to smile whilst eating them either, but should adopt a supine posture staring at the floor.