use as a parcels train. In July 2021, Eversholt and Wabtec revealed 321334 in the Swift Express livery. If successful further units could be converted. In November 2021 it was announced that 4 more Class 321s would be converted to Swift Express, with the first of these units expected to be delivered in February 2022. In 2022 it was announced that an unnamed customer had secured its first unit. Later confirmed as Varamis Rail which launched a service between Scotland and Birmingham in January using unit 321334. The final 2 units to be converted were expected to be finished in September 2022. Battery conversion In 2022 it was announced that Eversholt and Vivarail are working on a design to convert 321s to battery units that could last up to 30 minutes on battery power. Aborted proposals Hydrogen conversion In May 2018, plans were announced by Eversholt and Alstom to convert a number of Class 321 units to run on hydrogen fuel-cells, as a way of replacing diesel-powered trains on lines that are unlikely to be electrified. The details of the conversion project, dubbed 'Breeze', were published in January 2019, with an expectation that units could be ready for service in 2022although this later slipped to 2024. In November 2021 Alstom and Eversholt announced that they had decided to switch their primary focus to developing a hydrogen-fuelled variant of Alstom's Aventra EMU, on the grounds that the pool of convertible Class 321 units was too small to support the market they envisaged for hydrogen-powered trains in the UK, and that the Aventra's advanced technology and reduced requirement for routine maintenance were advantages in both manufacture and operations. Although the companies stated that they would maintain the "option" of converting existing trains in the future, the Breeze project was ended in the first half of 2022 and at least one of the Class 321 units selected for conversion (321448) was sent for scrapping. Fleet details Named units 321312: Southend-on-Sea 321321: NSPCC Essex Full Stop 321334: Amsterdam 321336: Geoffery Freeman Allen 321342: R Barnes 321343: RSA Railway Study Association 321351: London Southend Airport 321361: Phoenix 321403: Stewart Fleming Signalman King's Cross 321407: Hertfordshire WRVS 321413: Bill Green 321425: Bletchley Seven Silver Service 321427: Major Tim Warr 321428: The Essex Commuter 321439: Chelmsford Cathedral Festival 321444: Essex Lifeboats 321446: George Mullings References External links 321 321 Train-related introductions in 1988 25 kV AC multiple