Wash the blackberries thoroughly.
Mix the blackberries thoroughly with the sugar in a large bowl.
Spoon the blackberries and sugar into a sterilised jar. Leave for 24 hours to allow the blackberries to macerate in the sugar and release their juices.
Add the gin to the jar of blackberries and sugar. Shake thoroughly to ensure it is mixed.
Leave in a cool, dry, dark place for four weeks.
At the end of that time, the gin is ready to drink! Strain the gin into sterilised bottles through a muslin cloth held in a funnel and it will keep for approximately six months.
