London Dry (Beefeater, Tanqueray) — juniper-forward, dry. House standard. Plymouth (Plymouth) — earthier, slightly sweeter, protected geographic indication. Old Tom (Hayman's, Ransom) — slightly sweetened, pre-cocktail-renaissance style. Genever (Bols) — Dutch malt-base ancestor of gin. New Western / contemporary (Hendrick's, Aviation) — botanical-forward, sometimes less juniper. Match style to drink: classic Martini = London Dry.