The BBC could close TV channels and move shows to YouTube as the new director-general warned staff that “tough choices are unavoidable” in order to make £500m in savings.

Arriving at Broadcasting House at 8.15am on Monday, former Google Europe boss Matt Brittin pressed “send” on an email to staff explaining that the BBC must move with “urgency” to reinvent itself in a world of “limitless choice”.

Brittin raised the prospect of cutting back the BBC’s sprawling platforms and services to its essentials. “We should ask ourselves, honestly: if we were inventing the BBC today, what would we do?” the former team GB Olympic rower asked. “Then respond with clarity, pace and purpose.”

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“We must be where audiences are, and experiment more bravely,” Brittin said, acknowledging that YouTube is becoming the default viewing options for millions of young people.