Never mind who he is, who are you? Judges and magistrates in British courts (whether operating under English or Scottish law) don't use gavels. This man is clearly an auctioneer in a bad wig.
So many times do I see gavels being associated with British courts that I'm sure that most of the population must believe judges do use them here. Maybe if they took to using something clearly not a gavel — a shoe, perhaps, or a bring-out-your-dead bell — then that would go some way to correcting this false assumption.