> They still owe me over £100 but it's probably useless to attempt to collect.
If you have the time, please take the matter to small claims court out of principle (in fact, you can tack on reasonable fees for your time on top of the claimed amount).
If you have the time, please take the matter to small claims court out of principle (in fact, you can tack on reasonable fees for your time on top of the claimed amount).