Banoffee Tart is best served fresh, immediately after decorating with whipped cream, however you could freeze the base, well wrapped in foil and in an airtight container for up to one month. Thaw in the fridge overnight and assemble with filling and toppings on the day of serving. Once decorated you can store in an airtight container in the fridge for up to 2 days (... if it lasts that long!!)