London Underground soon realised that vastly increased passenger flows into St Pancras would have a knock-on effect on the passenger numbers at the ageing King's Cross Underground station.
Already stretched to its limit, King's Cross passenger numbers over the peak three hour period were forecast to rise from the current 55,000 to 87,000 by 2007. For safety's sake alone, something had to be done.
As a result, last year LU let a £250M contract to joint venture Costain/Taylor Woodrow to expand the existing ticket hall, and build two new ones.
A new western ticket hall is planned beneath St Pancras' existing Euston Road station entrance, and a northern ticket hall will be constructed to the west of King's Cross train shed.
Work has already begun on utility diversions and other advanced works for the scheme. Excavation of the forecourt at the entrance to St Pancras station is under way.