Why the UK government is reviewing the emergency alert. The celebs who’ve got their Twitter blue ticks back. The graphene “tattoo” that could help hearts keep their beat. And the new tea blend that allegedly tastes of “stale cigarettes”.

Also in this episode:

• Millions of low-income families missing out on cheap broadband
• 1912 Titanic inquiry plans sell for £195,000
• Northern Lights illuminate the UK sky
• Short activity bouts ‘can help type 1 diabetes patients with blood sugar levels’
• Researchers develop way to break down masks using fresh air and electricity
• The end of Winston Churchill’s favourite tea blend

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