Hey, is that a Big Ben? It looks just like mine. Of course they can be repaired, that's the great thing about mechanical movements. Whether you would want to pay what watch/clock repairers charge these days is another matter.
Am I going mad, or is the presenter calling herself Lynn Jinks the same person who used to be called Liz Garnet? I can't find any mention anywhere on the web about this, but I have watched Gems for years and I'm sure that used to be her name.