 There are also LED displays inside, at the end of each carriage above the gangway which give route and customer service information.The first batch of 44 Class 357/0 units were ordered at a cost of £200 million by Prism Rail in March 1997 to replace the slam-door units, and allow the return of 18 hired sliding-door units to their other franchise West Anglia Great Northern.Construction started in 1999, and they are currently leased by c2c from Porterbrook.