This "Emma" (2009) (TV mini-series) photo contains
bonnet, poke bonnet, boater, leghorn, panama, panama hat, sailor, skimmer, straw hat, fedora, felt hat, homburg, stetson, and trilby.
There might also be
pith hat, pith helmet, sun helmet, topee, topi, snap brim hat, porkpie, and porkpie hat.