The United Kingdom Railway Network, managed by Network Rail, is a system of interconnected railway lines used for passenger and freight transportation in Train Sim World, connecting cities and regions across Great Britain and Northern Ireland via United Kingdom in Europe. 

Here’s a more detailed breakdown:

Key Components and Organizations:

• Network Rail: Owns, operates, maintains, and develops the railway infrastructure in England, Scotland, and Wales, including tracks, bridges, tunnels, signals, and stations. 
• Great British Railways (GBR): A new public body that will run and plan the rail network, own the infrastructure, and receive the fare revenue. 
• National Rail: The brand name for the UK’s country-wide train system, encompassing various train operating companies (TOCs). 
• Train Operating Companies (TOCs): Private companies that operate passenger services on the National Rail network. 
• Rail Delivery Group: A group representing passenger train operating companies (TOCs) of England, Scotland, and Wales. 
• British Railways: The former national railway system of Great Britain, created by the Transport Act of 1947. 
• Northern Ireland: Has a separate, independent railway network, connected to the Republic of Ireland. 
• Channel Tunnel: Connects the Great Britain network to mainland Europe. 

History and Development:

• The railway system in Great Britain is the oldest railway system in the World, with the first locomotive-hauled public railway opening in 1825. 
• The railway network underwent significant expansion during the 19th century. 
• The Transport Act of 1947 nationalized the railways, which were taken over by the British Transport Commission (BTC) in 1948 and given the name British Railways. 
• British Rail was privatized between 1994 and 1997. 
• The railway network has been used to transport goods of various types and in varying volumes since the early 19th century. 

Key Features:

• Extensive Network: The National Rail network in Great Britain spans over 10,000 miles of track. 
• Passenger and Freight Transportation: The network is used for both passenger and freight transport. 
• Urban Rail Networks: Well-developed urban rail networks exist in London and several other cities. 
• Interconnectedness: The network connects major cities and regions across Great Britain and Northern Ireland. 
• High-Speed Rail: The line from London to the Channel Tunnel is the only line designated ‘high speed’. 
• Signalling: The UK railway signalling system uses colour light signals to indicate the safety of the route ahead. 
• Station Categorization: The 2,579 railway stations on the National Rail network in Great Britain are classified into six categories by the Department for Transport. 

Rail Network Lines

Great Western Express

West Somerset Railway

Northern Trans-Pennine

Tees Valley Line

East Coastway

Bakerloo Line

Isle of Wight

Southeastern High Speed

Southeastern High Speed Extended

Cathcart Circle Line

London Commuter

West Cornwall Local

Spirit of Steam

Island Line 2022

Birmingham Cross-City Line

ScotRail Express: Edinburgh – Glasgow

Midland Main Line

Peak Forest Railway

Glossop Line

East Coast Main Line

Blackpool Branches

London Overground Suffragette Line

Fife Circle Line

West Coast Main Line: London Euston – Milton Keynes

West Coast Main Line: Preston – Carlisle

Levenmouth Rail Link

Locomotives and Multiple Units

BR Class 08 Locomotive

BR Class 09 Locomotive

BR Class 20 Locomotive

BR Class 31 Locomotive

BR Class 33 Locomotive

BR Class 37 Locomotive

BR Class 40 Locomotive

BR Class 43 HST Locomotive

BR Class 45 Locomotive

BR Class 47 Locomotive

BR Class 52 Locomotive

BR Class 66 Locomotive

BR Class 87 Locomotive

BR Class 101 Multiple Unit

BR Class 142 Multiple Unit

BR Class 150 Multiple Unit

BR Class 153 Multiple Unit

BR Class 158 Multiple Unit

BR Class 158 Sprinter Multiple Unit

BR Class 166 Multiple Unit

BR Class 170 Multiple Unit

BR Class 313 Electric Multiple Unit

BR Class 314 Electric Multiple Unit

BR Class 323 Electric Multiple Unit

BR Class 350 Electric Multiple Unit

BR Class 375 Electric Multiple Unit

BR Class 377 Electric Multiple Unit

BR Class 380 Electric Multiple Unit

BR Class 385 Electric Multiple Unit

BR Class 387 Electric Multiple Unit

BR Class 390 Electric Multiple Unit

BR Class 395 Electric Multiple Unit

BR Class 465 Electric Multiple Unit

BR Class 483 Electric Multiple Unit

BR Class 484 Electric Multiple Unit

BR Class 700 Electric Multiple Unit

BR Class 801 Electric Multiple Unit

United Kingdom Railroad Companies

Avanti West Coast

British Rail

DB Cargo UK

Direct Rail Services

East Midlands Trains

Gatwick Express

Great Western Railway

London North Eastern Railway

London Underground

Northern

Ocean Network Express

Rail Operations Group

ScotRail

Southern

Southeastern

Transport for Wales

West Midlands Trains