Assassin's Creed: Brotherhood - The Da Vinci Disappearance

I recently bought ac:b from the UK, but i am in NZ with a NZ psn account. I am interested in the da vinci dlc but dont want to have to create a uk account and get a psn card for 1 dlc.

I know that for a lot of games (but not all) the uk and aus/nz dlcs are compatible. Was wondering if anyone in aus/nz has tested the da vinci dlc with a uk disc?

What worries me is that when i go to extras/downloadable content from the game, the 3 free dlcs show up, but da vinci doesnt (but its in the normal store).