Crossrail 345008 is the unit between barrier wagons of the 7X20. br/The strongClass 345/strong Aventra electric multiple unit are being manufactured for London's Crossrail. 66 nine-car trains are being manufactured at a total cost of pound;1 billion, with each train able to reach 140 km/h (90 mph) and carry 1,500 passengers. The first train entered service on 22 June 2017 on the current a href="https://en.wikipedia.org/wiki/TfL_Rail" target="_blank"TfL Rail/a route between London Liverpool Street and Shenfield as a seven-carriage unit, until the platforms can be lengthened as the 9-car sets cannot be accommodated at Liverpool Street