Instructions:To claim the free Thorntons chocolates enter the order code 110-221-59WW using the quickshop facility on the website (use link above) or over the telephone, the free chocolates will be added to your order.
I was sent this voucher in the post to encourage me to make an order as I haven't for a while. The picture shows a nice double layered box of assorted chocolates, they are in a gold box and named the 'Classic Collection.'
There is no expiry date mentioned on the voucher. From my experience it would seem their deals go on until they run out of stock.
Don't forget to check for other 24Studio free gift codes here on HUKD as more than one can be used on an order. I've had three different free gifts in a parcel from them in the past.