Here is a summary of the latest NWP output for noon (GMT) on Saturday.
Issued 0444z, 4/05/10.

The weekend still looks like seeing a cool north to northeast flow over the
UK with an omega block west of Iceland. Northern and northeastern areas are
at risk of rain but even elsewhere the odd shower can't be ruled out.

ECMWF: http://www.wzkarten.de/pics/Recm1201.gif
Northerlies cover the UK as the result of a high near Iceland and low
pressure over France. There are further northerlies on days 6 and 7 as high
pressure persists to the NW.

MetO: http://www.wzkarten.de/pics/Rukm1201.gif
The Met Office run shows the UK between a high to the WNW and a low to the
ESE, with NNE'lies on both days 5 and 6.

GFS: http://www.wzkarten.de/pics/Rtavn1201.png
Low pressure covers France, leading to NNE'lies over the UK. There are
northerlies on day 6 as the French low moves eastwards, followed by NW'lies
as a trough moves southwards on day 7.

GEM: http://www.wzkarten.de/pics/Rgem1201.gif
GEM shows a low over England and Wales with NE'lies elsewhere.

JMA: http://www.wzkarten.de/pics/Rjma1201.gif
JMA brings NE'lies for all with a large high near Iceland.