Changes

In 2015 the need was identified for a 'spare' carriage to replace vehicles from [[https://www.svrwiki.com/Carriages#The carriage setsSet_N|Set N]] that were due to be withdrawn in turn for overhaul. 25771 was thoroughly overhauled at [[Carriage Repair Works|Kidderminster Carriage Works]], having been photographed there in in May 2015 on Facebook, and outshopped in a later variant of BR maroon livery-with maroon ends. Appropriately the interior is typical of latter day Mk 1, being clad with light grey patterned Formica. The 48 seat configuration with which the carriage was originally fitted has been replaced with a 64 seat configuration (the change dating from the Network South East era?) and the carriage data plate edited accordingly (the plate also shows a weight of 37 tons rather than the 36 tons recorded for Lot 30685).

Following this overhaul, 25771 was used as a stand-in for Set N as intended. It has since been was then available for operational use as required. It had repairs in spring 2021, replacing worn crash pillars and replacement metal work around the gangway fittings<ref>Branch Lines April 2021</ref>, and emerged in [[https://www.svrwiki.com/Carriages#Set_M|Set M]] from a bogie overhaul and revarnished paintwork in spring 2023.