Lemon and raspberry iced tea

1.Combine sugar and raspberries in a heatproof bowl, stir to combine, and cover with foil. Place over a saucepan of simmering water and cook until syrupy (2 hours). Strain through a fine sieve into a large jug (discard solids) and set aside.

2.Meanwhile, combine tea and 1 litre boiling water in a separate heatproof jug and cool. Strain through a fine sieve into raspberry mixture, add lemon juice and refrigerate in bottles until chilled.

3.To serve, fill glasses with ice, add lemon and raspberry tea to taste, top up with soda water, add mint and lemon slices and serve.