three-car units, by removing the TSO vehicle and reclassified as Class 320/4s. First Capital Connect / Great Northern First Capital Connect received thirteen units (401–410, 418–420) from London Midland, following deliveries of the new Class 350/2s. The units worked on the Great Northern services from London King's Cross to Peterborough and Cambridge from December 2010 until May 2017. They passed with the franchise to Great Northern in September 2014. All were replaced in 2016 by Class 387s, cascaded from the Thameslink route. Ten (402, 405–410 and 418–420) moved to Ilford depot for use by Greater Anglia, with the remaining three (401, 403, 404) converted to Class 320/4s for Abellio ScotRail. Arriva Trains Northern / Northern Rail / Arriva Rail North / Northern Trains Arriva Trains Northern inherited three Class 321/9 units. These units operated on the Leeds to Doncaster Wakefield line service and occasionally on the Wharfedale and Airedale lines alongside Class 322 and Class 333s. All passed on to Northern Rail in 2004 and were refurbished in 2006/07. Having passed with the franchise to Arriva Rail North and Northern Trains, all were replaced by Class 331s with the last withdrawn in 2020. These have transferred to Greater Anglia for temporary use until Class 720s arrive. Renatus project In December 2013 Eversholt Rail Group rebuilt 321448 as a demonstrator at Doncaster Works for a proposed upgrade. It featured a new livery, completely refitted interior including two examples of sitting arrangements including 2+2 and 2+3, and a new First Class area. The demonstrator also featured air conditioning, not previously seen on Class 321 trains, along with fixed panel windows to replace opening windows and a new Vossloh Kiepe traction package. The production run covered 30 units. The Vossloh Kiepe traction package was installed at Wolverton Works with the rest of the work performed at Doncaster. The first was completed in December 2016. In 2017 the prototype returned to Doncaster to be modified to the same specifications as the production units, including being refitted with hopper windows. Future After being awarded the new East Anglia franchise in August 2016, Greater Anglia placed an order for Class 720s which will replace the 321s despite the Renatus project. The first of the new trains entered service in November 2020. The first two units were sent for scrap on 26 January 2021. Swift Express In March 2021, Eversholt announced its intention to convert 321334 for