Add the Pimm’s to a large iced tea glass filled with ice. Stir in the lemonade and top with the ginger ale. Skewer the cucumber slices and strawberry halves, alternating them as you like. Garnish the drink with the skewer, the orange slice, and the mint.
Slicing the cucumber with a peeler yields very thin slices, but you can also use a mandoline or a knife.