Jetstream - currently W-ly soon looping with UK getting the N-ly side of the loop from Mon15th (the loop promotes HP to the NW of UK); the loop becoming more extreme Fri 19th with the UK getting E-lies from an almost closed circulation. The jet then straightens out somewhat and forms two branches, one weak and waving N of UK while a broad flow appears across N Africa Sun 21st onwards
GFS op - W-ly veering to N-ly by Mon 15th as HP establishes W of Ireland, and eventually to E-ly in the S as this HP cell moves to Scotland Sat 20th. The HP sinks S-wards but hangs around the UK to end of run Sun 28th, however not in a fixed position so weather influences can come come from any point of the compass depending on its exact position on any given day -though persistent enough to keep any major systems at bay.
GEFS - a lot of variability between runs (much more so than yesterday) presumably relating to the exact position of HP as above, even from as early as Mon 15th. Mean temp close to norm (or somewhat below in the S esp around Sat 20th). Rather dry throughout.
ECM - similar to GFS though always tending to keep HP further W and by Mon 22nd to the extant of bringing in NW-lies
War does not determine who is right, only who is left - Bertrand Russell
Chichester 12m asl