Looks like Serco needs to buck its internal auditing and honesty up a bit if it wants to bid for the future Northern and Merseyrail franchise renewals
http://www.theguardian.com/business/2013/aug/28/police-serco-alleged-fraud
The Guardian said:The justice secretary, Chris Grayling, has called in the City of London police to investigate alleged fraud by Serco staff working on a £285m contract to transport prisoners to and from courts across London and East Anglia.
Grayling said it had "become very clear there has been a culture within parts of Serco that has been totally unacceptable".
http://www.theguardian.com/business/2013/aug/28/police-serco-alleged-fraud