Council refunds bus lane fines: can you claim?

Adam Peck/Press Association Images

Hertfordshire County Council has confirmed it will be refunding motorists who were fined for using a bus lane in Hemel Hempstead, after the Traffic Penalty Tribunal ruled that signs were unclear and unlawful, so the fines were unenforceable. It's going to cost them over £1 million.

So what went wrong, and how can you challenge fines you think are unfair?