Gossipgyal contacted Studio Canal's PR (Studio Canal is Bel Ami's UK distributor) about the Berlin premiere and a possible UK event and received this reply:
"Premiere event for Bel Ami will be in Berlin on Feb 17th so we won't be doing one here in London"
What has been confirmed:
Bel Ami will have it's world premiere at the Berlin Film Festival
The 62nd Berlinale runs Feb 9-19. (More info here)
We'll know more and confirm the date soon. The full programme (with all dates and times) of the Berlin Film Festival will be out on January 31st.
The Programme Press Conference for the 62nd Berlin International Film Festival will be held on January 31, 2012, at 11 a.m. Source