opera hat

"I know some members may feel that they look particularly fetching in the opera hat, but it really does make the House of Commons look ridiculous," she told MPs.

GIBUS: A man’s collapsible top hat, also called an opera hat.

GIBUS: A man's collapsible top hat, also called an opera hat.

Until 1998, MPs were able to wear an "opera hat" to draw attention to themselves to raise a point of order.

Shirt, collar, trousers, waistcoat, swallowtail, opera hat, tie, gloves, studs, buttons—everything just his size.