Waihangahia tētahi putanga matatini ake o tēnei rerenga The ring of steel is the popular name for the security and surveillance cordon consisting of several hundred CCTV cameras surrounding the City of London, the financial district at the heart of Greater London. Ko te mowhiti o te maitai te ingoa rongonui mō te ahuru me te aro turuki i ngā rau o ngā kāmera CCTV e karapoti ana i te Taone o Rānana, te rohe pūtea i te pū o Rānana Nui.
Ko te tikanga, ko te putanga matatini ake o te rerenga ko "Ko te mowhiti o te maitai ko te ingoa rongonui mo te ahuru me te tirotiro i te ahunga o nga kamera CCTV e karapoti ana i te taone nui o Ranana, i whakauruhia i nga tau 1990 hei aukati i te IRA Motuhake me etahi atu riri. "