Guys guys, easy!
Remember November 2010, there was alot of chopping and changing all the way till the start of the cold spell. We had eye candy -15c uppers showing at one stage even in T140 with the gfs and then back to -5c in between runs with attempts of the Atlantic pushign back in FI. This was just bound to happen, we see great charts and expect them to keep showing up, but it just doesnt happen like that
I wouldn't totally undermine the GFS, but take 4 daily runs and see the overall pattern day by day.
If by tomorrow 18z GFS continues this tread and IF backed up by the UKMO and ECM then i'd be worried.