Place the elderberries, water, cloves, cinnamon, and grated ginger in a pan and bring to the boil. Immediately reduce the heat and simmer for thirty minutes. or until reduced by about half.
Strain the mixture using a cheese cloth or an old pillowcase, being sure to squeeze out all the juice.
Add the honey to the warm mixture and stir until completely combined.
Carefully pour the syrup into glass bottles (it helps to pour it from the pot to a jug first), and keep refrigerated.