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Leeds railway station is the second busiest railway station in England outside of London. It is one of 19 stations managed by Network Rail.
Leeds is an important hub on the British rail network. The station is the terminus of the Leeds branch of the East Coast Main Line which provides high speed inter-city services to London and is an important stop on the CrossCountry network between Scotland, the Midlands and South West England connecting to major cities such as Birmingham, Glasgow, Edinburgh, Derby, Nottingham, Reading, Bristol, Exeter, Plymouth and Penzance. There are also regular inter-city services to major destinations throughout Northern England including Manchester, Liverpool, Newcastle and Sheffield. It is also the terminus for trains running on the scenic Settle to Carlisle line.
Leeds is a major hub for local and regional destinations across Yorkshire such as to York, Scarborough, Hull, Doncaster and Sheffield. The station lies at the heart of the Metro commuter network for West Yorkshire providing services to Bradford, Wakefield, Dewsbury, Huddersfield and Halifax.
With 25 million passenger entries and exits between April 2011 and March 2012, Leeds is the busiest railway station in the North of England and the third-busiest railway station in the United Kingdom outside London, after Birmingham New Street and Glasgow Central.

Listed buildings and structures are officially designated as being of special architectural, historical or cultural significance. There are over half a million listed structures in the United Kingdom, covered by around 375,000 listings.
Listed status is more commonly associated with buildings or groups of buildings, however it can cover many other structures, including bridges, headstones, steps, ponds, monuments, walls, phone boxes, wrecks, parks, and heritage sites, and in more recent times a road crossing (Abbey Road) and graffiti art (Banksy 'Spy-booth') have been included.

In England and Wales there are three main listing designations;
Grade I (2.5%) - exceptional interest, sometimes considered to be internationally important.
Grade II* (5.5%) - particularly important buildings of more than special interest.
Grade II (92%) - nationally important and of special interest.

There are also locally listed structures (at the discretion of local authorities) using A, B and C designations.

In Scotland three classifications are also used but the criteria are different. There are around 47,500 Listed buildings.
Category A (8%)- generally equivalent to Grade I and II* in England and Wales
Category B (51%)- this appears generally to cover the ground of Grade II, recognising national importance.
Category C (41%)- buildings of local importance, probably with some overlap with English Grade II.

In Northern Ireland the criteria are similar to Scotland, but the classifications are:
Grade A (2.3%)
Grade B+ (4.7%)
Grade B (93%)

Read more at Wikipedia Link