To protect myself against severe weather I might partially cover my face but I'd cerainly not be peering through a half inch slit draped in robes down to my ankles as these religious extremists and fugitives from justice do. For national security and public protection people need to be visible to CCTV cameras. Furthermore it is totally against our British culture and it is a symbol of refusing to integrate.
20 years ago the only veiled up beings you saw were the Saudi princesses arriving at Heathrow and they soon ripped them off before they hit the west end shops. Now it is all over the place as a symbol of extemism