Only days after rebranding the DTI as the Department for Productivity Energy and Industry as part of last week's reshuffle, Tony Blair has caved in to universal derision by reverting to Department of Trade and Industry.

The prime minister was persuaded to retreat by Alan Johnson whom he appointed on Friday to head the department. In his first and last newspaper interview as secretary of state for productivity energy and industry, Mr Johnson explained his insistence on becoming simply trade and industry secretary.