[10] Compared with the diesel multiple units they replace, the 755s have more seats, mains and USB sockets, faster Wi-Fi, air conditioning and improved passenger information systems.

Because the trains have power-packs to contain the diesel generators, the floor is lower than usual, providing better accessibility to wheelchair and pushchair users.

[11] The first unit was delivered to the UK in November 2018 which gave an initial entry into service date planned for May 2019.

[15] As more units gradually entered service, Greater Anglia was able to withdraw all its diesel multiple-unit trains in favour of the 755s.

The unusual layout for a British train allows a lower than normal floor level, enabling step-free boarding at standard-height platforms.

The driver of 755416 initiated an emergency brake application, but the train was unable to stop until it was 230 m (750 ft) beyond the level crossing.

[24] In response, Greater Anglia imposed a temporary 20 mph (32 km/h) speed restriction over six level crossings on the Bittern Line.

The frequency of Rail Head Treatment Trains over the Bittern Line was increased from weekdays only to daily during leaf-fall season.