I don't think there's much difference between the GFS a and ECM in mid-range and I think there is less difference between them than there is between ECM and UKMO. They both show high pressure building towards the UK with a deep low heading off to north scandinavia, which is how most Greenland Highs form and it's the type of thing we saw in 2010, 2009 and even 1962. In fact the set up ECM is showing in FI is ridiculously close to the set up just before the 62/63 winter got going (not making any assumptions here though haha). Either way, it's encouraging to see so many possibilities where we could get a good cold spell, unlike a few days ago were both ECM and GFS went for zonal.