I have been doing the Guardian crossword for over 50 years, but my old brain is finding it very difficult these days. I started well with this one on Saturday morning, but came to a full stop. Returning from time to time during Saturday and Sunday, I made very little progress until, latish on Sunday, when I resorted to the Forum. With its help - many thanks to everyone - I finished it, and having done so I finally understood the theme. Very clever. And that is the main reason for writing: did anyone else notice the recent weekday one, also by Brendan, where every clue was themed? I don't remember even Araucaria achieving that.