Their early withdrawal was caused, primarily, by BR classifying the hydraulic transmission as non-standard. They were reasonably reliable and easy to repair, but designed as technical odd-balls with expensive to make non-standard parts. Formal withdrawal was not the end for three locomotives: 7076 and 7096 continued to be officially in non-revenue stock for some years; while 7089 also continued, but renumbered as TDB968005 in the Departmental series. Four examples survived into preservation.