What an extraordinary grid: 38 answers, necessary perhaps to accommodate the theme. I thought this was quite hard, indeed was unable to finish because I wasn’t sure about 4dn (that’s my excuse anyway, although it isn’t a good one). 23ac simply defeated me. However, although hard, it was sound and there were some good clues.
Apologies again for slight lateness. The computer problems I referred to last time I blogged haven’t gone away, and some of this is being done by hand. Hope it’s going to work.
Definitions in maroon, underlined. Anagram indicators in italics.