Quote:
Originally Posted by John H-T
Building dates for the various shunter classes were as follows:
01 - 1956; 02 - 1960-61; 03 - 1957-62; 04 - 1952 - 1962; 05 - 1955-61; 06 - 1958-60; 07 - 1962; 08 1952-1962; 09 - 1959-62; 10 1955-62 & 14 1964-65.
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And class 11 was even earlier (1945 says Wikipedia) as this was the LMS class from which the 08s were derived.
I believe that the class numbering system was based roughly on power, so Class 01 would be the least powerful ...