It won't though, will it. You'll pay for two teas, a burger and a veggie pie. When you get to the front the operator will tell you they've run out of veggie pies and will have to get the supervisor over to sort out a refund whilst looking at the hot water tap in utter confusion.
They need a...
So will this prevent people getting to the front of the queue before they start asking thier family what they want ?
(I'm ESU too and have never heard of it)