Schedule 4 sustained planned disruption - defined service group revenue values
13 January 2014
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Start date: 26 October 2010 End date: 5 April 2011 We consulted on the methodology and values for calculating defined service group revenue for each franchised train operator. The defined service group revenue is one benchmark used to identify whether an operator has experienced a period of sustained planned disruption (SPD), typically as a result of Network Rail's planned engineering activities