A significant adjustment with the Wed/Thu rain/snow event on the 00z ECM and GFS; that extension of the 1010 mb line well south of the UK reflects slight secondary LP development, which wasn't there on the 12z runs.
Ironically the models aren't far off going full-circle, back to a few days ago when the disruption was looking very pronounced, with a notable secondary low dropping south.
Result in the case of GFS is a stall sooner than before and with a better transition to snow:
It does drift east after this but weakens rapidly as the frontal system occludes out.
Interestingly ECM has slightly colder air ahead of the front so a larger portion of the precipitation could fall as snow.
Of the high-res models, WRF is similar to GFS (but weirdly the snow disappears as it pushes further east - diurnal warming despite heavy cloud cover? As if!), while ARPEGE occludes the boundary very quickly except across the far south, this seemingly being due to the lowering of pressure focusing further north than GFS and ECM have this morning, with a slight southerly component to the flow for the south... but the flow is so slight that this seems a bit unconvincing to me:
Originally Posted by: Stormchaser