Banana chips, caramel, shortbread and flakes of sea salt ... syrup and condensed milk into a saucepan and stir over a low heat until the butter has melted, stirring all the time.

tipping them each this way and that until the caramel has evenly coated the base and sides. Set aside. Heat the milk, cream and lavender in a separate saucepan over a low heat until just simmering.