We see UK tv judges using gavels all the time in tv courtrooms. But, as the Guardian points once again in this article, real life UK judges don't use them in real life courts....We can ask that the writers cease and desist. Cut it out. Stop it. Halt. But I think that they won't, because gavel banging is colorful (sorry, colourful) and makes an exciting noise, and resonates (sorry again) with viewers who may be more familiar with US tv courtrooms, in which tv judges do use gavels. The power of pop culture!