This is one of my favourite drinks. To me, it's the taste of an English summer.
300g/10oz caster sugar
The juice of half a lemon
1 litre/13/4 pints water
Don't bother to wash the raspberries; they are too delicate for running water and will disintegrate. Instead, pick over gently with your hands, removing any other little things that sometimes find their way in.
Place the fruit in a medium-sized saucepan, cover with the sugar, squeeze over the lemon juice and pour over the water.
Place over a medium heat and bring to a boil. Stir once or twice so that the sugar dissolves. Turn down and simmer for about 6-7 minutes or until the raspberries disintegrate.
Remove from the heat and allow to cool slightly. Pass through a colander to strain, pressing down on the fruit.
Most of the raspberry flesh is soft enough to pass through, leaving the pips behind. Allow to cool, then pour into a glass vessel and place in the fridge.