It looks like you will need to fill in a form as per the 1020 camera grip offer. And then its 28 days after that
As per the T&C's posted from Phones 4 u
"6.The offer can be claimed by visiting nokia.ly/930-offer-uk and entering the IMEI number which came with the phone (found on the side of your Nokia box or by entering *#06# into your phone). Customers must then complete an online form containing their name, address, email address and date of purchase.
7. The Accessories kit is intended to be delivered within 28 days of application, however please note that in the event of extensive demand there might be a delay with the delivery of accessories."
mmmm thinking this will work for us impatient buggers who got ours from Amazon France lol