Original: The franchise , which began 11 November 2007 , was formed through the amalgamation of the former Midland Mainline , which operated inter-city services from London to Yorkshire , and the eastern side of Central Trains operating companies .
Simplified: Based in Derby , it provides train services in the East Midlands and surrounding areas , chiefly in the counties of South Yorkshire , Nottinghamshire , Leicestershire , Derbyshire , Northamptonshire and Lincolnshire .