It was also the only original A1 to not be rebuilt by the LNER as an A3 .
Great Northern is historically significant because it was the first Pacific to be built by the Great Northern Railway as a prototype of the new ' 1470 class ' .
Great Northern was also the only original A1 to not be rebuilt by the LNER as an A3 .
Great Northern is historically significant because it was the first Pacific to be built by the Great Northern Railway as a prototype of the new ' 1470 class ' .