I have found several post saying it is possible in QGIS to export OS Boundary Line shp files to csv's containing the boundary line in lat/lng (for use on Google map) along with the name of the area, some with instructions on how to do it but when ever I follow them it doesn't work for me.
I've only just downloaded QGIS so I don't know my way around as yet.
Steps so far:
Clicked "Add vector file", right click on layer and click "save as". Then select format "CSV", set CRS as "Layer CRS" and coordinate reference system as "WGS 84". I tried putting "GEOMETRY=AS_XY" and "GEOMETRY=AS_XYZ" in the layer field. Click ok and I get a file containing information about the polygons like name etc... but not the boundary line in lat/lng.