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US general urges Britain to spend on armed forces

28 May 2015 Last updated at 23:04 BST

A senior US general has told the BBC it is imperative that Britain finds the money to spend on its armed forces, and that he is worried about the impact of recent defence cuts.

His comments come as the US carried out sea trials for a new state-of-the-art jump jet, which Britain is set to buy from the US. But the F-35 is already way over budget.

Defence correspondent Jonathan Beale was given exclusive access to its final sea trials.