Thai basil syrup
Bring the water and sugar to the boil in a small pan. Reduce the heat, add the Thai basil, simmer for approx. 5 mins., leave to cool, strain.
Place the strawberries and sugar in a blending cup, leave to absorb for approx. 10 mins. Add the lime juice and basil leaves, puree.
Pour the strawberry puree and gin into 4 glasses (each approx. 200 ml). Add 1 tbsp of syrup to each glass, mix, top up with the mineral water, garnish with the Thai basil and strawberries.