Gently dip the elderflower heads in cool water then place in a non corrosive pan with the lemon peel, sugar, wine and water. Dissolve the sugar over a moderate heat and simmer gently for 10 minutes.
Remove from the heat, stir in the lemon juice and leave to cool slightly.
Cut the cherries in half and remove their stones over a mixing bowl so that you catch the juice. Halve the strawberries if they are on the large side and mix into the cherries.
Strain the warm ( not hot) syrup over the fruit, pressing the juice from the flower heads. Leave to macerate until you are ready to eat.