Direct links to some of the APIs/data files:

Neighborhood Statistics API: http://neighbourhood.statistics.gov.uk/dissemination/Info.do...

NHS Choices API: http://www.nhs.uk/nhscwebservices/Pages/Webservices.aspx

EduBase School Data: http://www.opsi.gov.uk/advice/poi/edubase300608.zip

XML data file of "official notices": http://www.londongazette.co.uk/mashup/gazettesrdf.htm