(British) A form of civil protection (using closed-circuit television, control zones and restricted access) that effectively seals off city centres and financial districts; used in Northern Ireland and the City.
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UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.
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