I really enjoyed this, Paul is one of my favourite setters as like with this one I find them a good level of difficulty - solvable but not all done before 9am! I got 24d, 25d and 18d first which led me to solve 28a and figure out what was going on with twice capital thing.
Favourite clue was 9a for the misdirection from the first word. Also made me smile once I had it as my father-in-law who has a penchant for using obscure words in place of common one refers to their daily exercise as this (the clue rather than the solution)
Could someone give me a hint for the passing of 29a. I miss coffee shops. :-(