.... although this has the usual elements of "blowing one's own trumpet" about it, the page has a useful diagram which summarises the current suite of UK models (in terms of resolution & areal extent) and has a link to a pdf file which gives a briefing of future developments:...
http://www.metoffice.gov.uk/services/accuracy
Martin.
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West Moors / East Dorset
Lat: 50deg 49.25'N, Long: 01deg 53.05'W
Height (amsl): 17 m (56 feet)
COL category: C1 overall