THE RECORD
What changed
The Stockton–Darlington line ran steam traction in 1825; Liverpool–Manchester offered regular passenger and freight service in 1830.
EVIDENCE
What remains
Locomotives, engineering drawings, company records and timetables preserve the system.
WHY IT MATTERS
Why it matters
Railways joined markets and cities and encouraged standard time, while expanding land seizure and dangerous labour.
OPEN QUESTION
Where interpretation begins
Calling 1825 the single first railway obscures earlier mine lines and parallel development.