UPDATE (9/12): Guess who's changed their tune?.. we KNEW it was too good to be true. It appears now everyone is getting the trailer at (or around) the U.S. designated time, meaning an early Wednesday morning (1am GMT) for you UK.
Love Film is claiming the UK will get to see the new Breaking Dawn trailer early Tuesday morning, meaning 4pm PST the day BEFORE in the U.S. (which is supposed to get it on the evening of the 13th) - so cancel those Monday evening plans America! (and hope they don't region block the viewing).
In the meantime, let's check out that 15 second teaser again ;)