So, are they all bored out of their minds yet?!
Nah! Lots of sleeping, lots of gaming (some retro Super Smash Bros, plus he was very happy to come second in a Steam tournament, lol), and he's being surprisingly sociable, has seen several friends.
Has cleared out all his old books, is selling the ones that are decent but unwanted on Amazon, and took a few back to school - they didn't want most of them back due to the GCSEs changing. I'd written cards to the teachers who have really been there for him and me in the last couple of years, and he went and found them and gave them the cards and chocolates and told them he was leaving ... I was nearly crying writing the cards and then again when he told me he'd actually given them out in person - I was expecting him to leave them in reception.