5 Empty gas canisters (South Norwood SE25)

1 Large FloGas canister; 2 smaller FloGas canisters and 2 other small canisters. These can be exchanged for full canisters. I believe that some suppliers will give refunds on the empties or exchange for full ones at normal rates. I don't drive so I can't take them back for a refund. All to go together if possible.