Possibly a new thread in its own right but for all you PFI fans out there:
"The part-privatisation of the Tube has cost taxpayers almost £1bn, according to a House of Commons Public Accounts Committee report.
It also said maintaining and upgrading the network will cost £450m more than if finance came from government loans.
Under the deal the Public Private Partnership (PPP) firms do not have to end maintenance backlog until 2026 or complete some upgrade work until 2015."
http://news.bbc.co.uk/1/hi/england/london/4395621.stm
I know, kinda off topic but PFI has been raised here.