It was a "you be the judge" contest where you had to do an application for the academy of law. I was 15, winning in the "Y-dult" category as a runner-up, so that would have been 1985.
I won a book but it never came. In the end, my mum called up the 2000 AD offices and inquired, and they sent a Rogue Trooper Titan book with "something extra", which turned out to be Steve Dillon's autograph. It was completely thrilling to me, and is a nice memory, especially since we so recently lost Steve and, coincidentally, my lovely mum.