Hello - I found some 2011, 2012, 2013 and 2014 shp files on a government website. 2011 and 2012 were delivered in BNG coordinate system and the other 2 were in GCS_ETRS_1989 coordinate system. I have tried converting these to BNG through the arctoolbox/projections and transformations/project but nothing changes - even though the 'properties' box states BNG coordinate system. I've also tried to convert these in ArcMap/properties etc. but the 'properties' box states BNG, but the projections are still different to the 2011 and 2012 projections. Can someone help?