Britain's claim to be a world leader in green energy investment has been called into question by an authoritative new study that will embarrass ministers as they prepare to launch an important climate change initiative tomorrow.

A report from Deutsche Bank says that the UK does not have the right climate change strategy to attract international investment and is lagging behind other countries, such as Germany, France and China.

Britain's energy strategy lacks the level of transparency and certainty required to encourage investment, according to Deutsche Bank's study on the best places to do business. It comes as ministers prepare to launch six draft national policy statements on energy and climate change policies tomorrow.

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