A source of historical climate data for the UK. Monthly summaries and UK/regional contoured maps for are available online. Historical weather station weather observation data and long-term statistical climate averages from 1961-2000 (station, district, regional) are also online in html format. Methods and Analysis links include a spatial analysis of trends in the UK cklimate since 1914 using gridded datasets in addition to monthly gridded data sets for a range of climatic variables over the UK.
More data is also available through the Met Office's DataPoint: http://www.metoffice.gov.uk/datapoint
HTML, raw ASCII text, Adobe PDF
Freely available data on internet.