It's a bit of a pain but do some research beforehand and you should be able to get some money back. There is a website that gives you lots of detail on getting road inspection reports etc through the Freedom of Information act. AA, Which, Money Saving Expert and
www.potholes.co.uk are all useful. The fact that it has been identified with paint but not repaired should work in your favour, the repair time would have been based on the severity of the hole.
I logged 3 on the East Sussex Highways website last night. Clouted one in the morning, same front left wheel that I damaged before Christmas.