Preheat the oven to 350?F. In a medium bowl, toss the blueberries with the sugar and flour until well blended. Pour into a pie plate (or divide between smaller or individual baking dishes), sprinkling any sugar that has collected in the bottom of the bowl over the fruit. Drizzle with the bourbon.
In the same bowl, combine the crumble ingredients and blend with a fork or your fingers until well combined and crumbly. Sprinkle over the fruit and bake for 40-50 minutes, or until golden and bubbly around the edges. Serves 6.