The demo disc was included with Street Fighter Alpha Warriors' Dreams in the UK. It was placed in a white paper sleeve, and contains the censored trailer. The demo disc could be exchanged for GBP 5 off of Resident Evil at HMV.
A yellow sticker on the front of the box advertised the demo disc. Curiously, none of the games with the demo and the yellow sticker seem to have come with a holographic Sony sticker on the front.
1. Front with sticker
2. Back
3. Front of manual
4. Game disc
5. Demo disc
Thanks to eBay member justplainnuts1 (image 5).