From the BA FPP website...
"We will be opening the website for applications on Monday 19th November 2012. We will close the website for applications on Thursday 13th December 2012, unless we receive an overwhelming number of applications in which case we reserve the right to close the application window early. If we have to do this, however, we will make it clear on this page that we are closing the application window early and will email everyone who has started an application to give them 48 hours’ notice of the window closing"