I believe that was originally the plan - certainly that was being touted in 2006 when the increase to 9 mths was on the way - but since then I've heard it's been put off till 2010 and/or after the next election. I really hope I'm out of date and it's back on the agenda! Not that I have any personal interest in this anymore though!
If you're due after October you do get a bit of a boost though. Your benefits have to continue for the full 12 months - so if you get a car allowance or anything that might be a bit extra in your pocket?