This from The Hoots-mon...
According to the BBC on HS2:
"Can a railway be worth £121m per mile?"
Mere bagatelle!
Consider the triumph that is the Edinburgh tram system. £1billion for 8 miles = £125m per mile.
So. Time for a new unit of HS2 cost: for each 'Edinburgh Mile' you get £4m change.
Bargain!