Here is a summary of the latest NWP output for noon (GMT) on Tuesday. Issued 0427z, 18/08/12.

ECMWF: http://www.wetterzentrale.de/pics/Recm1201.gif
WSW'lies cover the UK as the result of a low to the NW. There are SSW'lies on day 6 as a ridge builds over England and Wales, followed by southerlies due to a low to the west on day 7. Day 8 sees stronger WSW'lies as the low moves northwards, followed by westerlies on day 9. Day 10 sees another low to the west with moderate SSW'lies over the UK.

MetO: http://www.wetterzentrale.de/pics/Rukm1201.gif
The MetO run has WSW'lies with the UK sandwiched between a low to the NW and a high to the south.

GFS: http://www.wetterzentrale.de/pics/Rtavn1201.png
WSW'lies cover the UK, the result of a low to the NE. There are lighter WSW'lies on day 6, followed by southerlies ahead of a low on day 7. Day 8 sees a deep low over Ireland, with southerlies for areas south of Scotland. Scotland lies under ENE'lies. The low fills over England and Wales on day 9, with NE'lies elsewhere and by day 10 northerlies cover the UK as the low moves away to the east.

GEM: http://www.wetterzentrale.de/pics/Rgem1201.gif
GEM shows SW'lies with lows to the north and NW.

JMA: http://www.wetterzentrale.de/pics/Rjma1201.gif
The Japanese run has SW'lies for all with a trough to the north of Scotland.

In summary, the latter half of the working week will be changeable. Low pressure will be to the west or NW, with a ridge to the SE; all areas are likely to see rain at times but the SE of the UK will see the least due to the nearby ridge. The Bank Holiday weekend currently looks like being breezy and showery.

Thanks Darren