Support Battery drain after official JB update, any advice?

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http://androidforums.com – Hi folks, I updated to the official Jelly Bean build on Three in the Uk yesterday. When I first got my phone on ICS I played around checking wakelocks etc and managed to get everything set up so battery drain in standby was around 0.5 % per hour so 3 or 4% drop over night (if not plugged in of course). Last night with JB though my phone droppped roughly 3 times that much I'm currently at 70% wiht 11 hours standby and just 34 min screen time. Its not completely tragic but much worse than on ICS so I'm guessing theres a problem In Battery Stats on the phone, Android OS has 'Stay awake' as (General)