Mix together the orange juice, lemon juice, orange liqueur and brandy, if using, in a glass pitcher/jug. Slice the peaches, orange and strawberries and add them to the pitcher. Put in fridge to chill if not using immediately.

Carefully add the cava to the pitcher, trying to avoid it bubbling up too much, mix gently and add a little sugar to taste if you like (1-2tbsp at most). Add some ice and serve, with a little more ice in the glasses.