It cost Â # 26million and will house seven million items , stored in more than 140,000 bar-coded containers , which are retrieved by robots , from the 262 kilometres of temperature - and humidity-controlled storage space . The new facility , costing Â # 26 million , has a capacity for seven million items , stored in more than 140,000 bar-coded containers , which are retrieved by robots , from the 262 kilometres of temperature and humidity-controlled storage space .