Final paragraph of Headcoat's post; wow if I had a £ for every time I had gone through the tunnel and wondered why it was set up like that... Then, well, I'd only be paying 60p to go through it at the moment.

But you must think back, before the great pound coin scandal, you paid at the manned booth, got your change, and the operator lifted the barrier so you didn't use the bucket. Hence there was no reason for then to be apart.

Now you go to a staffed booth and receive change for the money you give them, then head to the bucket so huge operator finishes shift with same amount of money as they started,

I suggest cost to move the bucket forward is prohibitive despite their nice new expensive police cars.