No. 31105 was the third of Network Rail’s Class 31s to return to traffic and the only former disc headcode-fitted locomotive in the fleet, although it could often be found partnered with Howard Johnston’s hired in Fragonset, later BR blue-liveried, ‘skinhead’ No. 31106 on test trains. The former D5523, new to Stratford in March 1959 and withdrawn from Bescot in May 1997, was selected in 2002 for rebirth in NR’s QADD pool along with No. 31107.

While the latter fell by the wayside, No. 31105 was released from Derby in yellow in August 2004, externally almost unchanged from its previous condition, even retaining the extra lamp iron on its plated nose doors. However, by the second half of 2005, Derby had taken the opportunity to remove the cab roof vent cover from the No.1 end cab roof to match the No.2 end that had been rebuilt in early 1984.

While in late 2007, the front ends were further modified with same LED tail lights and the washer jet modifications described above with No. 31285.All good things come to an end though and No. 31105 was withdrawn for the second time in February 2015, leaving just No. 31233 still active for NR.

Still in working order, it was occasionally used as a shunter at the RTC site before being sold into preservation at the Mangapps Railway in Essex in October 2018.