Here is a summary of the NWP output for noon on Tuesday.
Issued 0449, 08/02/13

The middle of the week will see a weak ridge or col over the UK giving way
to a trough from the west, with temperatures rising a little over the UK as
a result.

Analysis and evolution to T+120 via GFS
NNW'lies cover the UK as the result of a ridge to the west. There's a col
tomorrow, followed by southerlies on Sunday. Monday sees low pressure over
southern England with easterlies further north.

T+120 synopsis
http://www.wetterzentrale.de/wz/pics/Rtavn12014.png
http://www.wetterzentrale.de/wz/pics/Rtavn1201.png
http://www.wetterzentrale.de/wz/pics/Rukm1201.gif
http://www.wetterzentrale.de/wz/pics/Recm1201.gif
http://www.wetterzentrale.de/wz/pics/Rjma1201.gif
The jetstream chart shows a ridge to the west with a northerly flow over the
UK. At the 500hPa level there's a weak NW'ly flow, as is the case with MetO.
The other runs show more of a northerly flow with the upper ridge further
west.
At the surface GFS brings a ridge from the NW, leading to a mixture of
SE'lies and ENE'lies. MetO has a col, while the other runs show NNE'lies.

Evolution to T+168
ECM brings a col on day 6, followed by southerlies on day 7 as a trough
approaches from the west. GFS shows a trough crossing the UK on day 6,
followed by a weak ridge and WSW'lies on day 7.

Looking further afield
Days 8 to 10 with ECM show SW'lies and SSW'lies with low pressure to the
west and NW. GFS has low pressure moving eastwards over northern Scotland on
days 8 and 9, leading to WSW'lies and westerlies elsewhere. On day 10 there
are WNW'lies as the low moves away eastwards.

Ensemble analysis
http://www.meteociel.com/cartes_obs/...&ville=Londres
The GEFS shows mean highs of between 3 and 5C until the 16th, followed by
milder conditions.

ECM ensembles
http://www.weathercast.co.uk/service...-forecast.html
ECM still shows 3 noticeably cold days from the 11th followed by somewhat
milder conditions.