Metoffice Outlook sort of says the same thing as the GFS for early next week...
UK Outlook for Friday 16 Mar 2018 to Sunday 25 Mar 2018:
For Friday, outbreaks of rain are likely to affect some northern and eastern areas, where gales are possible too. The rain is likely to gradually fragment as showery conditions already in the south and west, spread slowly eastwards with time. Over the weekend slightly more settled conditions may develop across the whole country, but with a risk of rain and gales returning to the west and south, while in the north and east some snow showers are possible. It may become rather cold for most, with frosts possible. It will be drier, although further wintry showers are likely in the east and northeast, and this is likely to continue towards the end of March. It will be mostly breezy, and gales are likely in the northeast.
UK Outlook for Monday 26 Mar 2018 to Monday 9 Apr 2018:
There is a lot of uncertainty throughout this period, and the forecast detail may change nearer the time. Conditions will probably start unsettled and rather cold, with rain or showers for many, and the risk of snow at times, mainly but not exclusively in the north. It may then stay unsettled but become milder, with westerly or southwesterly winds. This would bring the wettest and windiest conditions to southern and central areas. Temperatures will generally be mostly below the average for the end of March and into early April, however, there remains a chance that drier and much colder conditions could still affect the UK at times.