Via boards.ie, It seems if you order a free book made by Hellmans, you can avail of free postage for anything else you add to your order.
Simply go here: http://www.amazon.co.uk/hellmanns, add the book to your cart, click on “Proceed to the checkout”, choose your postal address and on the payment page add the gift certificate code “HELLMANAMZN2” and click to continue. Choose a payment method for the rest of the order.
You should now notice that postage for the other items are free. Handy for Christmas shopping.