Interesting question Emma, I really like lemon tea and end buying that liptons stuff now and again so I am glad you asked I can start making my own now 8)
Heres a recipe it is from an american site cooks.com so I think the lemonade is american home made stuff rather than R whites or whatever
Make tea with tea bags. Steep 5 minutes. Add sugar, lemonade and limeade. Place in gallon container and finish filling container with water. Stir well.
And a recipe for lemomade
1 cup sugar
2 lemons
Water
Extract the juice from the lemons.
In large bowl, mix sugar and lemon juice. Dilute with water to taste.