WORKERS will carry the can for a “back-of-a-fag-packet stunt” of extending all-night running on the Tube, transport unions warned last night as Tories unveiled a £10 billion transport investment package for the capital.

Plans to roll out a 24-hour service on deep level Tube lines will now be extended to the sub-surface Circle, District, Metropolitan and Hammersmith and City lines — along with the London Overground rail network in 2017 and the Docklands Light Railway in 2021.

Tory London Mayor Boris Johnson also announced an order for an additional 200 buses in his controversial “new routemaster” model — which cost twice as much to manufacture as ordinary buses.