I've got no ceiling on Lib Dem ambitions, says leader Ed Davey

Image source, PA Media Image caption, Sir Ed Davey and Lib Dem MPs visited a wind farm off the south coast of England

Lib Dem leader Sir Ed Davey has insisted he is not just aiming to be a junior partner in a coalition government, saying: "I am a candidate to be prime minister."

He also backed the controversial Jackdaw gas field, which the government is expected to green light later this month, saying it had "passed the climate test" and was compatible with a transition to renewables.

Sir Ed has faced criticism from some in his party that he lacks ambition and the vision needed to cut through in a crowded political field.

He acknowledged the "frustration" felt by some of his MPs that the party was not making a bigger impact - and vowed to set out bold policies in his conference speech on Tuesday.