Cut 1 cm strips of peel from half a lemon. Place the peel in a mug with the mint leaves. Pour in 1 ½ cups boiling hot water. Leave to infuse for 5 minutes.
Place the tea bag in a mug and add the remaining hot water. Leave to infuse for 5 minutes.
Juice the lemon and pour it into a jug. Add the honey. Pour both the tea and lemon mint infusion into the jug. Stir well to melt honey.
Add the remaining water and leave to chill in the refrigerator for 2-3 hours.