I made the classic mistake of telling the kids in my first lesson that this was my last day - at the start of the lesson. Rather, I confirmed the "rumour" that was going around the school. I won't be doing that again.
People have been very sweet. I even got a chocolate cake and a card.
So, I'm happy to report that I've taught my very last lesson as a PGCE student and that does feel good. Now, the expectations will be higher, so I suppose I should really savour this feeling.