Instructions:*Zedmeister in the forum points out existing members can get 20 free by entering SUNSNAPFISH20*
To get 40 free digital photo prints from Snapfish, you must be a new member and not have used a Snapfish powered online photo service previously.
Promotional Code: SUNPRINTOFFER
How: Follow the above link to Snapfish.Co.UK, register as a first time user and follow the guidelines to upload your photos. Use the promotional code during checkout.
Thanks for the pointer in the forum herby247!