See link for specific details but in a nutshell details are as follows:
Follow this link and add the blueberries to your trolley: http://oca.do/ZhIg305xKQV
Place an order worth £40 or more, for delivery between 27th–29th October.
Add the voucher code VOU2392878 as you check out.
We’ll deduct the cost for the first 700 customers to redeem