Shops near telephone boxes are always being asked for change, and usually refuse to give it. If you need change urgently, and cannot find anybody to help you, it is a good idea to buy a small item, such as a box of matches, and ask for your change to include the required coins.
A. Excuse me, but could I trouble you for some change?
В. Let me see. Do you want coppers or silver?
A. I want some change for the parking meter.
В. You'd better have silver, then.
***
– Sorry to trouble you, but have you change for a pound?
– I'll have a look. What do you want it for?
– I have to get a book of stamps.
– In that case you need silver.
***
– Excuse me. I wonder whether you could change a pound.
– Let's see. Coppers or silver?
– It's for a phone call.
– Will tens do?
***
– Excuse me. Could you oblige me with some change?
– I'll see what I've got. What's it for?
– I need some cigarettes from this machine.
– I can let you have some tens, if that's any good.