Master this and you'll always have a cocktail up your sleeve. Switch out the gin (heaven forbid!) for rum and you have a Daiquiri! For tequila and you have a Margarita. These style drinks date back to as early as 1862 and provide a great base for experimenting.
50ml Dorset Dry Gin
15ml sugar syrup
Add all ingredients to a cocktail shaker, shake with cubed ice and fine strain into a cocktail glass. Garnish with lime peel or some seasonal fruit.