The Stop HS2 organisation has criticised the Government's claim that HS2 is the only option to remedy over-capacity railways.
Penny Gaines, chair of the organisation, said the line will not open until 2027 and in the meantime will cause years of disruption.
Building HS2 would cause years of disruption at (London's) Euston (station), and other places on the rail network as well as chaos along the route of HS2, with roads being diverted during the build and in some places permanently shut.
However, Network Rail aren't planning to do nothing. They've already announced planned closures on the West Coast Main Line for 2014. It looks like they are positioning themselves to be able to blame others for any problems during these improvement works."
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His representatives said Cassidy, who was hospitalised last week, died "surrounded by those he loved."
The company’s recently appointed Chief Executive Dara Khosrowshahi said the breach was made by two individuals outside the company.