Thanks for starting the thread.
Agreed on Marmite.
I was about to post the following:
Thanks to Paul for this week's Prize challenge.
There's an obvious theme (or clue-linking device), which was difficult for me due to lack of various GK. And some solutions were unfamiliar words, particularly one intersecting pair. Net result is that I found the puzzle difficult and somewhat of a grind.
Given the (mini?) theme, I'm stunned there were no solutions along the lines of FLACCIDITY.
FOI 5, LOI 3.
Too tired after the ordeal to think hard about COD. 3, 12, 23 and 11 stand out on a brief scan.
Curious whether others found this difficult.