 As with most of the other GNP & BR stations , the station building was designed by Leslie Green , though at Holborn the station frontage was , uniquely , constructed in stone rather than the standard red glazed terracotta . This was due to planning regulations imposed by the London County Council which required the use of stone for façades in Kingsway . The station entrance and exit sections of the street façade were constructed in granite with the other parts of the ground and first floors in the same style , but using Portland stone . The rest of the building above first floor level was constructed contemporaneously with the station . Access to the platform levels of the station was provided by trapezium @-@ shaped electric lifts manufactured by Otis in America . These operated in pairs in shared circular shafts , with an escape stair in a separate , smaller shaft . 
