The British Rail Class 365 Networker Express dual-voltage (25 kV 50 Hz AC and 750 V DC) electric multiple unit passenger trains were built by ABB at Holgate Road Carriage Works in 1994 and 1995.

The purchase of 41 Class 365s was authorised in late 1993; they would be the last trains to be built at the Holgate Road works prior to its closure.

[7] Deliveries began in 1994 under Network SouthEast and continued after operations transferred to the private sector; the final unit was delivered to West Anglia Great Northern (WAGN) in July 1998.

In June 2018, ten sets were transferred to Abellio ScotRail to operate services from Edinburgh to Glasgow and Stirling.

[11] Although specified as a dual-voltage unit, Class 365s never operated with this capability since they were built with only one system of traction current pickup.

[2]: p.A.6  During testing and commissioning, 365502 ran briefly on the AC network, this being the main reason for the unit being chosen to be subleased to West Anglia Great Northern (WAGN) in the aftermath of the Potters Bar accident in 2002.

When they transferred to WAGN for use with 25 kV 50 Hz AC overhead line traction supply, the shoes and associated equipment were removed and a Brecknell Willis high speed pantograph was installed, along with other operator and voltage-specific modifications and testing by Bombardier Transportation at its Doncaster Works.

[14] However, because the British Railways Board had leased rather than purchased the Class 365s, under a clause in the original procurement contract, ownership of the remaining 40 sets passed to the Department for Transport subsidiary Train Fleet (2019) Limited in July 2019[15] after it was obliged to pay out the leases to the Royal Bank of Scotland in the event that the trains were not wanted.

[16][17] In July 2021, all were sold back to Eversholt after termination of their leases with Govia Thameslink Railway was agreed.

[21][22][23] Before it entered service, 365513 was damaged in a shunting incident at Chart Leacon TMD and was forwarded to Doncaster Works in November 1996.

[25][26] In 2004, all 16 of Connex South Eastern examples (365501 to 365516) were transferred to West Anglia Great Northern to release Class 317s for use by Thameslink.

[43][44] During June 2018, ten sets were transferred to Abellio ScotRail to operate services from Edinburgh to Glasgow and Stirling.

[46][47][54] In comparison with the three- and six-car DMUs previously used on the same routes by ScotRail, the eight-car Class 365 EMU sets provided an additional 17,200 seats per day, as well as having better acceleration and being cleaner.

Vinyl nameplates with a pink backing were applied to the driving vehicles, behind the cab doors, by First Capital Connect.