Originally a Webb 4 cylinder compound 1894 remained thus throughout the rest of the LNWR and wasn't rebuilt into the form shown here (class G1) until Jan 1923. It received its LMS No 9391 along with a Belpaire firebox in Aug 1927 and lasted to Jan 1962 when it was withdrawn as 49391 having been upgraded to Class G2a in 1945 by increasing the boiler pressure and other small modifications