Британский электропоезд Class 321

British electric multiple unit

The British Rail Class 321 is a class of electric multiple unit (EMU) passenger train built by British Rail Engineering Limited's York Carriage Works in three batches between 1988 and 1991 for Network SouthEast and Regional Railways. The class uses alternating current (AC) overhead electrification. The design was successful and led to the development of the similar Class 320 and Class 322. After operating for various trains operating companies after the privatisation of British Rail, they were latterly operated by Greater Anglia until April 2023. Some have been converted to Class 320 and are operated by ScotRail.

Three sub classes were built. The first two were built for the Network SouthEast sector for operation on services from London Liverpool Street and London Euston, while the third was built for Regional Railways for use on West Yorkshire Passenger Transport Executive services from Leeds. As part of the privatisation of British Rail, ownership of the class passed from British Rail to the Eversholt Rail Group in April 1994. A further 20 were ordered later. Units were numbered 321301–321366. The DTSO vehicle was equipped with a small area between the driver's cab and the first set of doors that could be used for the conveyance of parcels or luggage; this was indicated by a "P" following the unit number on the front of that vehicle.

In October 1988 a second batch of 30 was ordered. It was intended that 25 be used on Great Eastern Main Line services and five on West Coast Main Line services, but in the event all were delivered to Bletchley TMD for use on the latter. A further 18 followed. As with subclass /3 units, the DTSO vehicles were equipped with a parcels area indicated by suffixing a "P" to the unit number. These were built for outer suburban services on the West Coast Main Line, from London Euston to Northampton, Rugby and Birmingham New Street. They displaced the then recently cascaded Class 317s dating from 1981 which had themselves only just been introduced to the route to replace Class 310s. In 2007, 321408 and 321428 were loaned by Silverlink to c2c operating services out of Fenchurch Street while one Class 357 was repaired and another was undergoing tests in the Czech Republic. Following the delivery of the Class 350/2 fleet, 13 Class 321/4s (401–410, 418–420) were transferred from London Midland to First Capital Connect and overhauled by Wabtec's Doncaster Works. These passed with the franchise to Great Northern in September 2014. London Midland also released 17 (421–437) for transfer to National Express East Anglia. The remaining seven (411–417) passed to Abellio ScotRail in 2015, after being converted to three car Class 320/4 at Doncaster Works. In 2017, ten (402, 405–410, 418–420) were transferred from Great Northern to Abellio Greater Anglia. As at May 2018 the remaining three (401, 403, 404) are to be converted by Wabtec at Kilmarnock to Class 320/4 for use with Abellio ScotRail. Another two were to follow.

The final batch of three Class 321 units was constructed in 1991 and classified subclass /9. In March 1997 they passed with the Regional Railways North East franchise to Northern Spirit, which became Arriva Trains Northern in April 2001. In June 1998 they were loaned to GNER to operate Leeds to London King's Cross services while its InterCity 225 fleet was grounded with mechanical issues. All three passed with the franchise to Northern Rail in December 2004. The Class 321/9 units were refurbished at Hunslet Barclay, Kilmarnock from late 2006 to early 2007. The refurbishment included a new livery, refurbished interiors and reliability improvements, similar to the Class 322 EMUs, which were also refurbished at Kilmarnock.

In March 2021, Eversholt Rail Group announced its intention to convert 321334 for 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 two were scheduled to be completed in September 2022. In early 2024 Varamis Rail bought the four converted units from Eversholt.

Silverlink inherited 37 of the 48 Class 321/4 units. In September 2003, Silverlink's class 321 units were temporarily withdrawn following the discovery of loose bolts on brake discs in some units. In September 2004, London Euston to Birmingham local services were divided into two separate services: Silverlink retained London to Northampton services, while fellow National Express subsidiary Central Trains took over all local services between Northampton and Birmingham. Initially, Central Trains hired Class 321 units from Silverlink to work their new services, but the arrival of Class 350/1s meant that very few Class 321 units were then required. To accommodate this sub lease, three Class 321/3 units were transferred from National Express East Anglia to Silverlink. These were not permitted north of Rugby due to lack of the National Radio Network system (Eastern Region units only had the Cab Secure Radio System used for Driver Only Operated Passenger services) and therefore could not be used on Central Trains services (although they occasionally appeared on services to Rugby at weekends due to the line being closed between Rugby and Birmingham New Street). This ceased in late 2005 with the introduction of Class 350 trains on the Birmingham to Liverpool route. One of these sub leased units was involved in a low speed derailment at Watford Yard. In May 2007, Central Trains began using Class 321 units on some morning services from Birmingham New Street to Walsall. In November 2007, London Midland took over operation of the Class 321 fleet previously used by Silverlink and Central Trains. An order was placed by London Midland for 37 Class 350/2s to replace the Class 321s. London Midland withdrew most, retaining seven units (411–417). They were used for peak hour workings between London Euston and Northampton and on the Abbey line. In 2015, all seven were withdrawn for transfer to Abellio ScotRail to operate on Glasgow suburban lines, with the last withdrawn on 20 September 2015. They were replaced by Class 319s. The cascaded Class 321s were reformed to three car units, by removing the TSO vehicle and reclassified as Class 320/4s.

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 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 were transferred to Greater Anglia for temporary use until replaced by Class 720s.

First Great Eastern inherited all 66 Class 321/3 and 11 Class 321/4. The East Anglia franchise was subsequently taken over by National Express East Anglia, initially branded 'one', and then subsequently by Greater Anglia. A further 16 were added, upon release from London Midland. In 2016, ten of the sets formerly operated by Great Northern also transferred to Greater Anglia. An additional three units, all Class 321/9s, were transferred to Greater Anglia from Northern Trains in 2020 in order to provide capacity during the introduction of GA's new Class 720 fleet. The 321s were primarily used for services from London Liverpool Street to Braintree, Southend Victoria, Southminster, Ipswich (extending to Norwich during peak time), Walton on the Naze, Clacton on Sea, and Colchester Town, but could operate services on any electrified route if other trains failed. These operated as four, eight or twelve car sets. After being awarded the new East Anglia franchise in August 2016, Greater Anglia placed an order for Class 720s which replaced the 321s despite the Renatus project. The first of the new trains entered service in November 2020. From early 2023, the units only operated services from Manningtree to Harwich Town and from Colchester to Walton on the Naze, alongside units on the latter, as well as one service each day between Thorpe le Soken and Walton on the Naze. The last scheduled Class 321 workings took place on 3 April 2023, with the class subsequently being used on an ad hoc basis. Following a farewell tour on 29 April 2023, Greater Anglia completely withdrew its Class 321 fleet.

In December 2013 Eversholt 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.

In 2022 it was announced that Eversholt and Vivarail were working on a design to convert 321s to battery units that could operate between 20 30 miles on battery power. The battery units were planned to be used on routes in Scotland. 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,