The ECM is still showing the Azores high pressure re-building across
England and Wales and bringing a return of warm weather for many, but
the 06z is not so keen. GEM agrees with the ECM, having the whole of
the UK under high pressure at 10 days. Interesting and a possibility
of a return to 25C+ in 10 days, but by no means certain.

The MetO, month ahead forecast has been consistently forecasting a
cool and possibly a wet first half of June for a while now. Today, it
is backing away from that:

UK Outlook for Saturday 29 May 2010 to Monday 7 Jun 2010:
Probably rather showery on Saturday, with showers most frequent in the
east, and drier, brighter weather in the west. These drier and
brighter conditions should spread to most parts on Sunday, but
outbreaks of rain may reach western parts. From Monday onwards, it is
likely to be unsettled with showers or longer spells of rain, these
mainly in the west and it may be quite windy across northwestern parts
of the UK. However, some drier and brighter interludes are likely,
especially in eastern and southern parts. Temperatures should be
around normal but rather cool at first in the northeast, then possibly
becoming warm at times in the east. The last few days of the period
should see temperatures near or slightly above normal, with some good
dry spells.

Updated: 1241 on Mon 24 May 2010

and:

UK Outlook for Tuesday 8 Jun 2010 to Tuesday 22 Jun 2010:
The northwesterly flow is expected to decline as high pressure builds
from the west. Although perhaps still unsettled in the north and east
at first, all parts are expected to become drier and more settled.
Near average temperatures are likely to become above average in many
areas especially the south. Rainfall will be near to below average,
but locally above in parts of the north and east at first.

Updated: 1243 on Mon 24 May 2010

How much use is this, I don't know. I suspect little.