• Introduction to Underground Railways
   
• Introduction to London Underground
  

Sub-Surface Railways:

• Mersey Railway

• Glasgow City & District Railway

• Central Glasgow Railway

• Metropolitan Line
  
• (Metropolitan Railway)
  
  
• District Line
• (The Metropolitan District Railway)

• East London Line
• (East London Railway)
  

Tube Lines:

• Glasgow Subway

• The General Post Office Railway (London)

• The Great Northern & City Line
  

• Piccadilly Line
  
• (Great Northern, Brompton & Piccadilly Railway)

• The Bakerloo line
• (Baker Street & Waterloo Railway)