In a pan over medium heat, warm the raspberries with the FRUIT SYRUP until soft and easy to mash with the back of a fork.
Pour the chilled cream and yoghurt into a large bowl and use a whisk (or electric beaters or a food mixer) to beat it until it stands up in soft, droopy peaks.
Gently fold the cooled fruit into the whipped cream.
Put half of the whole peach slices into the bottom of 4 glasses then layer with the cream, peach purée, and a final drizzle of FRUIT SYRUP.