The pothole/brick wasn't there when I came back from work last night. The council has been filling in pothole all week around that area (there were a lot of them because of the snow and ice we had over winter). They've also removed two speed bumps too. Nice!
Anyway, I think I can down grade my GGRRRRRRRRRRRRRRRRRRRRRRRR to GRRRRRRR, as I think I've only damaged the trim. There's no vibrations at speed on the steering wheel or dashboard; the car doesn't particularly pull in any one direction; the tyre hasn't deflated even slightly.
Of course I'm no expert so I should probably take it in some place have a quick look see, maybe get the wheel balanced a bit...