Troubled Carillion wins HS2 building contract    

The project's major contracts are awarded for firms to build tunnels and viaducts between London and Birmingham.

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HS2 reveals winners of building contracts - BBC News
Contracts worth £6.6bn are awarded ahead of news on the final HS2 routes to Leeds and Manchester.

HS2 'will be the most expensive railway on Earth'
Britain’s new high-speed rail line will be the most expensive railway in the world with costs per mile expected to reach £403m, according to Government calculations.  The HS2’s first phase between London and Birmingham will cost almost £48bn, according to expert analysis commissioned by the Department for Transport (DfT). 

HS2 winning bidders announced amid fears costs may double
Troubled construction firm Carillion, which last week lost three-quarters of its share price following a profit warning, is among the winners.

HS2 contracts worth £6.6bn awarded by UK government
Construction work billed to start in 2018 announced as transport minister prepares to to announce changes to final Manchester and Leeds routes