Midland Main Line in the context of "Midland Railway"

A structure gauge, also called the minimum structure outline, is a diagram or physical structure that sets limits to the extent that bridges, tunnels and other infrastructure can encroach on rail vehicles. It specifies the height and width of station platforms, tunnels and bridges, and the width of the doors that allow access to a warehouse from a rail siding. Specifications may include the minimum distance from rail vehicles to railway platforms, buildings, lineside electrical equipment cabinets, signalling equipment, third rails or supports for overhead lines.

A related but separate gauge is the loading gauge: a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. The difference between these two gauges is called the clearance. The specified amount of clearance makes allowance for wobbling of rail vehicles at speed or the shifting of vehicles on curves; consequently, in some circumstances a train may be permitted to go past a restricted clearance at very slow speed.

St Pancras railway station (/ˈpæŋkrəs/), officially known since 2007 as London St Pancras International, is a major central London railway terminus on Euston Road in the London Borough of Camden. It is the terminus for Eurostar services from Belgium, France and the Netherlands to London. It provides East Midlands Railway services to Leicester, Corby, Derby, Sheffield and Nottingham on the Midland Main Line, Southeastern high-speed trains to Kent via Ebbsfleet International and Ashford International, and Thameslink cross-London services to Bedford, Cambridge, Peterborough, Brighton, Horsham and Gatwick Airport. It stands between the British Library, the Regent's Canal and London King's Cross railway station. Beneath both main line stations is King's Cross St Pancras tube station on the London Underground; combined, they form one of the country's largest and busiest transport hubs.

The station was constructed by the Midland Railway (MR), to connect its extensive rail network, across the Midlands and North of England, to a dedicated line into London. After rail traffic problems following the 1862 International Exhibition, the MR decided to build a connection from Bedford to London with its own terminus. The station was designed by William Henry Barlow, with wrought iron pillars supporting a single-span roof. At 689 feet (210 m) by 240 feet (73.2 m) wide, and 100 feet (30.5 m) high, it was then the largest enclosed space in the world. Following the station's opening 1 October 1868, the MR built the Midland Grand Hotel on the station's façade. George Gilbert Scott won the competition to design it, with an ornate Gothic red-brick scheme. St Pancras has been widely praised for its architecture and is now a Grade I listed building.