Hi crosswhit, the date for entries has gone, so.........I too had NETTED for 10d. The four clashes on the SW-NE diagonal were A/O, N/I, D/L & W/S. Entering A, N, D & W gave STANLEY BALDWIN, the author of the quote.
I never quite finished this; got the 3 flower anagrams + LILY, got the 3 birds, but could only find PEEL & HEATH as PM's (presume CANNING was the one made by having it's initial letter changed)?
Also unsure what name to enter.......must've been LOIS, but not sure why. Did these letters make the fourth bird?