powder

They are meant to collect the powdered tear gas chemicals, to keep the irritants from being tracked into the building on the soles of their shoes like dust.

The end result is a high-protein powder that is essentially dairy, but which Verley says is suitable for vegans as no cows are involved.

Straight from my grandmother’s recipe card: melted butter, grainy Dijon, a dollop of mayo, a splash of Worcestershire, garlic and onion powders, a little brown sugar, and a shower of poppy seeds.

"I'm trapped," Ali Watson tells me as she points to packs of bovine collagen powder in her kitchen.

A dusting of powdered sugar if you like.