to form ten-car services at peak times. When coupled together, coaches A-G are found in the front unit and the rear coaches become labelled J, K, L, M, N, with the first-class seats in coaches J and K. Initially, the 23 units ordered for Midland Mainline were four-car and nine-car. Over time these have been gradually modified to the current formations. The four-car units ordered by Hull Trains had an option when constructed to be extended to five cars if required. Operations Midland region With the exception of EMR Connect services, no route operated by East Midlands Railway is fully electrified. As a result, the majority of its fleet is composed of diesel trains such as the Class 222. Midland Mainline introduced the first of 23 Class 222 units on 31 May 2004, branding them Meridian. These replaced all the Class 170 Turbostars and some of the High Speed Trains, having better acceleration than both of them. Seven of the sets were nine-car Class 222 Meridians intended for an enhanced London St Pancras to Leeds service, but after the trains had been ordered, the Strategic Rail Authority decided not to allow them to run the service. The nine-car Meridians were used on London-Nottingham and some London-Sheffield services. When the trains were ordered, Midland Mainline overestimated the number of first-class passengers, and the four-car Meridians had less standard-class seating than the three-car Turbostars they replaced. Coach D subsequently had a section of first-class seating declassified for use by standard-class passengers. At the end of 2006, Midland Mainline removed a carriage from each of the nine-car sets and extended seven of the four-car sets, using the removed carriages. Following the formation of the new East Midlands rail franchise in November 2007, the entire fleet of Class 222 Meridians was inherited by East Midlands Trains, which operated the expanded East Midlands rail franchise, including all routes previously run by Midland Mainline. East Midlands Trains had named the following Meridians: In 2008 further rearrangements were made to the sets: another carriage was removed from the eight-car Meridians, except for unit 222007, which was reduced to five cars with two of the first-class coaches converted to part standard and part first class. The surplus coaches were then added to the four-car Meridians. These changes, which took place from March to October 2008, resulted in six seven-car sets (222001–222006) and 17 five-car sets (222007–222023). The seven-car