POT TV - The Mernahuana Zone with Matt Mernagh & co-host Lisa Campbell at Vapor Central. Retail Cannabis Invades UK & VanCity. Tues on weekly weed webcast The Mernahuana Zone we get updates on cannabis retailing in UK and Vancouver. Despite police raids, cannabis coffeeshops have remained open in Britain and more are coming. Police have been unable to shutdown the first retailer because mass protests keep them open.