London Boundary files
http://data.london.gov.uk/dataset/2011-boundary-files
converted to KML using http://www.gdal.org/ogr2ogr.html
ogr2ogr -f "KML" LSOA_2011_BFC_Barking_and_Dagenham.kml LSOA_2011_BFC_Barking_and_Dagenham.tab
London Boundary files
http://data.london.gov.uk/dataset/2011-boundary-files
converted to KML using http://www.gdal.org/ogr2ogr.html
ogr2ogr -f "KML" LSOA_2011_BFC_Barking_and_Dagenham.kml LSOA_2011_BFC_Barking_and_Dagenham.tab