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Between 2009 and 2014, thirteen ventilation shafts were refurbished. In the first phase were Drayton Park, Gillingham Street, Moreton Terrace, Pulross Road, Somerleyton Road and Tynemouth Road.[6] For the second phase were Cobourg Street, Dover Street, Gibson Square, Great Titchfield Street, Isledon Road, Kings Cross, Palace Street and Rita Road.[6]