Chief of Defence Staff: Why this is the ...

The country is under threat. Russian aggression, war in the Middle East and a military which has been ‘hollowed out’ for decades have all led to a crisis point for the United Kingdom.

In a special episode of This Is Why, Britain’s most senior military official has explained why he believes this is the most dangerous moment in his 35-year career.

In a wide-ranging interview with Niall Paterson, the Chief of the Defence Staff – Air Chief Marshal Sir Richard Knighton – has also revealed:

• How John Healey’s resignation as defence secretary took him by surprise
• The battle for more military spending, and what to do with the money
• Why it’s vital to have an honest conversation about national resilience

There is more exclusive content with Sir Richard Knighton on the new Sky News Defence Insider app.

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Have you got a question for Niall? Email us: why@sky.uk