One of the modified Franco-Crosti boilered 9Fs, No. 92021, with smoke deflector added around the final chimney. It was the drifting smoke problem with the original 10 locomotives that necessitated the diversion to Wellingborough in December 1955 of Nos. 92060-92066, which had been earmarked for Tyne Dock. No. 92021 is looking in a very sorry state at Derby shed on April 24, 1960. 