The event was THE GLORIOUS TWELFTH (1D/29) (12 August, opening day of the grouse-shooting season). Remaining unclued lights bring to mind ‘grouse’: LAGOPUS LAGOPUS SCOTICUS (43/19: scientific name); RUGOSE and ROGUES (11 and 3: anagrams); GRIPE and BLEAT (39 and 25: synonyms).
 
First prize Robert Burgon, North Berwick, East Lothian
Runners-up Jack Shonfield, Child Okeford, Dorset; Caroline Arms, Ithaca, New York