This is only available for people in the UK and those that are O2 customers. You can use the O2 priority app to get a free Naked Fruit Smoothie from Whsmith. All you have to do is redeem the offer on the app, go to any of your local WHSmith stores (make sure to check if they have stock first) and then you can get it for free. Make sure to only redeem it when you are in the queue as the code will disappear after around 5 minutes. Enjoy
