Filled the grid, found the clashes, and added the construction. So mostly done, but:
-I’m missing three misprints
-I think 37a and 39a each contain a misprint, but can’t see what the missing letters in the message could be
-37a “Irish mobs…” I have the wordplay, but how does the definition work?
-39a “report of trench mortar…” again, see the wordplay, no clue about the definition
-the last missing misprint is the fourth-to-last, and I know what the letter is, but no idea which clue I’ve misparsed, they all seem to work with no misprint
I really liked the endgame btw, the corners of my primary school maths book were filled with these things