TomTom Safety Cameras Scratch Card for 1 year subscription
Compatible with GO, ONE, ONE XL, XL, RIDER, NAVIGATOR models.
Instore image link: http://i34.tinypic.com/o8ayl4.jpg
(sorry for not able to do any better than this)
Product key: 0000086558
Sold at Currys in Crawley instore. I bought 3 of these myself on Monday after work. Plenty left when I bought mine. Usually sold at over £10 (even on eBay).