MICHAEL SHIELDS A far-right proposal to ban facial coverings in Switzerland won a narrow victory in a binding referendum on Sunday instigated by the same group that organised a 2009 ban on new minarets. The measure to amend the Swiss constitution passed by a 51.2-48.8% margin, provisional official results showed. The proposal under the Swiss system of direct democracy does not mention Islam directly and also aims to stop violent street protesters from wearing masks, yet local politicians, media and campaigners have dubbed it the burqa ban. "In Switzerland, our tradition is that you show your face. That is a…