units also worked Inverclyde Line services to and , mostly during peak hours. From November 2012 the fleet additionally operated services on the Paisley Canal Line, following its electrification. Overhaul and refurbishment A minor overhaul programme between May 2006 and mid-2007 included electrical upgrades and installation of improved door actuation mechanisms. Between 2009 and 2010, the fleet received a life-extension (C5E) overhaul that included refurbishment and/or replacement of the bogies, and alterations to the driver's cabs. Between 2011 and 2013, five units received a C3 major overhaul at Railcare Springburn, which included corrosion repairs, repainting of internal surfaces, replacement of linoleum flooring material, replacement of seat covers, refurbishment of bogies and couplers, reliability upgrades and repainting into the then-new ScotRail Saltire livery. Eight other units underwent the C3 overhaul but were not repainted, while the remaining three units received the same internal refurbishment but a less-intensive C4 overhaul. A further two units were repainted into the new livery in 2016, leaving nine in SPT's carmine and cream colours until their withdrawal. Replacement and withdrawal The increasing age of the Class 314 units, along with their failing to comply with the PRM-TSI requirements, made it unlikely that they would remain in service into the 2020s without further costly refurbishment. Ultimately this became unnecessary, as the continuing introduction of new units created sufficient spare capacity in the PRM-compliant Class , , and fleets to support withdrawal of the Class 314 fleet. ScotRail announced in May 2019 that Class 314 units would begin to be replaced by Class 385s on the Inverclyde Line that same month, leaving only three services—all early on weekday mornings—to be operated by 314s. Further withdrawals occurred throughout 2019, and the final Class 314 passenger service was worked from Paisley Canal to Glasgow Central by 314216 on 14 December 2019. ScotRail held a farewell tour for the class on 18 December 2019, with units 314202 and 314205 operating a special service around the ScotRail network, running to Ayr, Carstairs, Cumbernauld, and Helensburgh. The tour raised funds for ScotRail's charity partner MND Scotland. In the following year, all but one of the withdrawn units was scrapped. Hydrogen conversion In February 2020, ScotRail announced plans to convert the remaining unit, 314209, to be powered by on-board hydrogen fuel cells. The initiative is intended to study the feasibility of using hydrogen to fuel trains, as part of ScotRail's commitment to end its