As part of this, an order was placed with Stadler Rail for twenty 12-carriage electric multiple units that would join the FLIRT family.

[5] The 745/0 units were built to replace the Class 90 locomotive, Mark 3 carriage and Driving Van Trailer loco-hauled sets on the inter-city London Liverpool Street to Norwich services, which they have now fully done.

[7][8] However, delays in fitting their passenger information systems meant that Greater Anglia instead had to seek a derogation allowing the operation of their Class 90 + Mark 3 sets into 2020.

[9] Following this, the first 745/0 unit finally entered service on 8 January 2020 on the Norwich to Liverpool Street route and, by April 2020, had entirely replaced the loco-hauled fleet.

Conventional semi-permanent couplings join each pair of vehicles together, a difference from other FLIRT models (that use Jacobs bogies throughout) necessary in order to provide energy absorption should a collision or derailment occur.