Joining the Pieces of St Pancras' Jigsaw

London St. Pancras International is extremely challenging in terms of rail station construction. With Britain's first high-speed rail line due to begin service in November, there is increased pressure not only for St. Pancras' construction to be completed on time, but for operations to be seamless from the get-go. It will operate as an Underground station as well as four distinct heavy rail stations. The original St. Pancras station, built in the 1860s, was later rebuilt, and that facility comprises half of the present day station, with the second half a northern end extension with a contrasting flat roof. A consortium of companies was formed for the present station construction, with Emcor Rail responsible for making sure that station systems work as planned. Back office systems, among them communications, security, passenger information systems, and heating and ventilation, are critical to station operation and must be carefully integrated. Rolling stock testing is already taking place into the station.