This is the mySociety cache of Ordnance Survey OpenData, released 1st April 2010, and other related similarly-licensed data, as allowed under the licences.
Open PSI is a collaboration between the University of Southampton and the UK government, lead by the National Archive, to trial a new form of community provisioned information service. This is a new form of "community provisioned" Information Service where we hope to stimulate interaction between the following communities: public sector information publishers, the research community, mashup creators