Results, then (a few) pics...
109 cyclists in 18 minutes.
69% (75) male; 31% (34) female.
Helmets - 80% overall; 77% of men; 88% of women
Hi-viz - 25% overall; 20% of men; 32% of women
Lycra - 22% overall; 21% of men; 24% of women
Backpack - 56% overall; 59% of men; 50% of women
Pannier/Saddlebag - 29% overall; 28% of men; 32% of women
Courier bag - 7% overall; 8% of men; 6% of women
MTB - 34% overall; 35% of men; 32% of women
Hybrid (includes slick tyred MTB) - 43% overall; 40% of men; 50% of women
'Racer' - 20% overall; 21% of men; 18% of women
Folder - 2% overall; 3% of men; 0% of women
Tagalong - 1 (towed behind female cyclist)