Tuesday morning UK news briefing: Today's top headlines from The Telegraph

1. British Army chief: Ukraine is our ‘1937 moment’

Britain is facing its “1937 moment” and must be ready to “fight and win” to ward off the threat from Russia, the head of the British Army will say on Tuesday.

In his first public speech as the Chief of the General Staff, General Sir Patrick Sanders will warn that the UK must be prepared to “act rapidly” to contain Russian expansionism. Read the full story.

2. Nicola Sturgeon: Refusing a second referendum will make the UK look weak

Nicola Sturgeon has warned that the UK will be weakened on the world stage if her demands for another independence referendum are refused, ahead of her unveiling her route map for getting around the Government’s legal blockade.

The First Minister argued that Britain would be “in no position to lecture any other country about the need to respect democratic norms” if her request for a re-run of the 2014 vote was rejected. Read the full story.

3. Watch murder trials from home as courts told to allow videolink access

The public will be able to watch murder trials from home in a historic expansion of “open justice”.

All courts and tribunals will have new powers from Tuesday to enable the public and the press to observe hearings remotely via videolink, with judges required by law to promote “open and transparent” justice. Read the full story.

4. Royal family in privacy row with YouTube over video of Prince William confronting photographer

The Duke of Cambridge has spent years negotiating a world in which he can enjoy a weekend bicycle ride with his children in peace.

That ambition has suffered a setback, after a video Kensington Palace says breaches the Cambridge family's privacy was viewed by tens of thousands of people despite attempts to block it. Read the full story.

5. Mystery rocket crashes into the Moon – and no one (on Earth) is owning up

A mystery rocket has crashed into the Moon, creating a large double crater, leaving Nasa scientists baffled at who was behind the launch and why its impact was spread over two distinct areas.

No one on Earth has claimed responsibility for owning the rocket, and Nasa cannot explain why the impact created two craters when it crashed. Read the full story.