Christian Wolmar, author of the excellent history “Down the Tube” says

” One could hardly write the script as fiction. On the very day that Gordon Brown is teetering on the edge of oblivion and the House of Lords, one of his cherished projects, the London Underground PPP is breathing its last. The news that Transport for London is going to be taking over Tube Lines and running the contracts to maintain the Tube leaked out on the very day that voters were going to the polls. Since Metronet has already gone to join Railtrack, various franchises and the Strategic Rail Authority in the big dustbin of failed organisations, the demise of Tube Lines effectively means that the PPP joins this infamous group.”

link: http://www.christianwolmar.co.uk/2010/05/the-ppp-is-the-scandal-no-one-noticed