LNWR Precursor Class

The London and North Western Railway (LNWR) had two classes of steam locomotive identified as Precursor Class:

LNWR Webb Precursor Class of 1874–, by Francis Webb, a 2-4-0.
LNWR Whale Precursor Class 1904– by George Whale, a 4-4-0.
LNWR Precursor Tank Class, a 4-4-2 tank engines based on the Whale precursors

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