Carefully remove the peel from the lemons and place in a food processor along with the sugar and 1/4 of the water.

Remove the white pith from the lemons to leave just the fruit segments.

Add the fruit segments, and raspberries to the food processor.

Blitz in the food processor for 10 seconds.

Drain the mixture through a muslin cloth over a sieve and collect in a jug.

Dilute the lemonade mix with the rest of the water.

And serve, freeze any leftover in ice lolly moulds overnight.