Here's the present MetO forecast for 6-15 days:

UK Outlook for Tuesday 1 Jun 2010 to Thursday 10 Jun 2010:
Tuesday will probably still be rather unsettled with outbreaks of rain
in places, this locally heavy. It will then become increasingly drier
and brighter through Wednesday and Thursday as high pressure builds,
bringing settled conditions to all areas. Mist and fog patches are
possible around the coasts, whilst northwestern parts may remain on
the cloudier side with perhaps some rain, but elsewhere increasing
amounts of sunshine. Temperatures will be near or slightly above
normal initially before becoming warm and rather humid by Thursday.
Fine and warm weather is expected to continue into the weekend with
warm or very warm temperatures, ahead of a likely thundery breakdown
early the following week. There are then indications that the weather
will remain unsettled and cooler towards the end of the period.

Updated: 1224 on Thu 27 May 2010

Unfortunately, two-three weeks ago, the 15-30 day forecast was adamant
that we were headed for cool and wet weather at the start of June, for
aover a week.

I don't really monitor this, I've just remembered this as an example
(and I know full well that memory is a poor tool in that, but did
comment on it a lot at the time and it will be documented on here).
I'm not sure anyone bothers to monitor it and the MetO just allow what
they've said on the 15-30 day forecast to slip by without comment when
the weather is nothing like what they predicted. Of course there is no
seasonal forecast now, for good reason.

My point is; how useful is this to anyone. The MetO said they'd
introduced it because customer surveys showed they wanted it. Do they
really? Is it really of any use to anyone as it's accuracy seems to be
extremely suspect. Anyone with any other info about the monitoring,
I'd be interested.

Is it of any use to anyone?