To make the lemonade, mix the lemon and lime juice, raspberry syrup and caster sugar in a jug. Stir to dissolve the sugar. Add 575ml/1 pint water and plenty of ice.
Firstly, cut and then squeeze your lemons to collect the juice. Next add lemon juice to your water. Add the icing sugar to the lemon-water mixture. Give it a good stir until dissolved!