The East Coast Main Line Route Utilisation Strategy is a Route Utilisation Strategy (RUS), published by Network Rail in February 2008. It was the seventh RUS to be produced. By default, RUSs are established by the Office of Rail Regulation (ORR) unless the latter objects within 60 days. A letter formally confirming establishment, but with some qualifications, was sent by ORR to NR in April 2008, and the RUS is included in NR's map as established. The scope includes the whole of Strategic Route 8 - East Coast Main Line and Route 9 - North East Routes, but also a part of Route 5 (the Hitchin-Cambridge line). Not strictly within the scope, but relevant to the service mix forming present and future utilisation of the RUS area, are parts of Route 11 (to Sheffield and to Lincoln, and the diversionary joint GN/GE route from Peterborough to Doncaster via Lincoln), Route 10 (to Hull and to Bradford), Route 24 (to Aberdeen). As with other RUSs, the ECMLRUS took into account a number of responses, including the Office of Rail Regulation (ORR). The routes and services covered by the RUS are varied in type.