Here is a summary of the NWP output for noon (GMT) on Sunday.
Issued 0506z, 2nd July 2008

The week will start on an unsettled note, with low pressure over or very 
close to the UK. GFS shows the low lingering nearby with a slow drying-out 
process, while ECM is more progressive and brings a ridge by midweek. MetO, 
like GFS, keeps things unsettled through to Tuesday at least.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
Complex low pressure lies to the NW, with southerlies and SSE'lies across 
the UK. SSE'lies persist tomorrow and on Friday a col covers the UK. 
Saturday sees a low to the SW and SE'lies over the UK.

T+120 synopsis
http://85.214.49.20/pics/Rtavn12014.png / 
http://85.214.49.20/pics/Rtavn1201.png
http://85.214.49.20/pics/Rukm1201.gif
http://85.214.49.20/pics/Recm1201.gif / 
http://www.meteociel.fr/modeles/nogapse_cartes.php
The jetstream chart continues to show a southerly-tracking jet and a trough 
over the UK. There's an upper low over the UK at the 500hPa level, as is the 
case with MetO. ECM also has an upper low over the UK, while GEM centres its 
low over Ireland.
At the surface GFS has a low over England and Wales, with NE'lies for 
Scotland and NNW'lies for Northern Ireland. MetO has low pressure atop the 
Irish Sea, leading to SSW'lies for England and Wales and NE'lies or NNE'lies 
elsewhere. ECM's low is over the North Sea, resulting in strong northerlies 
for Scotland and Northern Ireland and SW'lies elsewhere. GEM brings a deep 
low over Ireland, resulting in southerlies for England and Wales. Elsewhere, 
winds are ENE'lies.

Evolution to T+168
Low pressure moves ENE'wards on day 6 with ECM, introducing cool NNW'lies 
for most. The winds become NW'lies on day 7 as a weak ridge moves eastwards.
GFS shows a trough crossing the UK on day 6. England and Wales are affected 
by WSW'lies, with northerlies elsewhere. Day 7 sees NW'lies as a ridge moves 
slowly eastwards.

Looking further afield
On day 8 SW'lies cover the UK with ECM, with a low to the NW. The low 
deepens over Northern Ireland on day 9, leading to strong SW'lies over 
England and Wales, with easterlies for Scotland. By day 10 the low moves 
away over the North Sea, leaving NW'lies for the UK.
Day 8 with GFS shows  NW'lies for all due to a ridge west of the UK. Winds 
become SW'lies on day 9 as the ridge moves across the UK, followed by 
westerlies and WSW'lies for most on day 10 as low pressure crosses Scotland.

Ensemble analysis 
(http://91.121.94.83/modeles/gens/graphe_ens3.php?x=306&ext=1&y=141&run=18&ville=Londres)
The ensembles continue to show a prolonged cool spell aloft, with a fair bit 
of rain on the way.