Wow! Well done Maskerade, happy Christmas and many thanks!
Brendan, I think you're missing a treat, I'm enjoying this very much.
I found a few straightforward clues in the ordinary stuff - 52d my FOI, 12a also easy - but couldn't resist getting into the lateral thinking required (in many different ways) for the 'preamble' clues. I think I'm about a third of the way in, with a few where I cannot find the words despite many crossers, but lots that I have tickling the back of my mind and some laugh out loud moments.
I'm sure I'll be back to find hints.
Best wishes to everyone here and thanks for all your help, solidarity and companionship through 2022. Here's hoping for a successful 2023