We've taken it apart and the list of things to repair it at the minute is:
1 x tyre for the ritz's wheel
2 x bearings (going to do both sides)
1 x left hand nut (may have one though)
1 x washer (may have one)
1 x rear hub
1 x radius arm!!!!!!!!!!!!!!!!
1 x radius arm bush kit
So it's a lot worse than it looks/expected, the pin the bearings sits on is damaged as is the hub. I would have just pushed the pin out and put a new one in but the radius arm has a little crack either when the bearings have got really hot and caused the pin the expand and crack the casting or where it locked up all of a sudden and pulled the pin.