+442077042579, O/S 131 Upper Street, London, N1 1QP

This one on a busy high street. It's found a way to be viable, by combining the box with a cash machine. I love it's bright yellow colour, makes it unmissable. However it doesn't ring that loud, but at least it rings. It is outside a trendy bar so has some overspill sometimes, just have to try it and see. Good luck.