* New Prisoner of Azkaban spoiler image found! - ..on the British official site

Summary:
The Official Harry Potter site for UK has a new secret movie image of 2 characters by a lake.

Article:

We think it's Harry leaning over Sirius but welcome other speculation!

See an enlarged version here

Thanks to Gary from TheSnitch.co.uk for pointing this out!

Taken from the Owl Post (Send an E-Card) section of the Official Harry Potter UK site (it's the third from the right.)