You were lucky, I managed to hit a pothole in Westminster on the A40 (Red route and all that) that made my alloy wheel come through the tyre... twice. Called them on one of those emergency phone booths as I stopped to try and take pictures and heard another 3-4 cars hitting it and going boom / hissssss within the space of a few minutes and they went yeah uhmmmm, that one... yeah thanks. Motorway maintenance truck pulls up 2 minutes later! and fills it up.
When I went throught he paperwork and eventually reached the council they pretty much told me to go whistle as they have evidence the road was "inspected" two weeks before the hole was there so there's nothing they need to do. From what I've read at the time, it was a pretty good defense in law.