
Stir gin, vermouth and brine in an ice filled mixing jug for 30 sec. Strain into chilled glass, garnish with olives.
Chill martini glass in the fridge or freezer until very cold (~150 - 200ml / 5 - 7oz glass size is ideal size - Note 4)
Thread the olives onto a skewer.
Stir - Fill a mixing glass about 500ml/2 cups in size (measuring jug or similar) with ice, nearly to the top. Pour in the gin, vermouth and brine. Use a bar spoon or table knife to stir briskly for 30 seconds, stirring around the outside in circles.
Garnish - Strain straight away into the glass (don't leave, it will dilute). Add the olive skewer. Enjoy!