Coronavirus blog as it happened: surge testing to begin in east London after variants detected; WHO approves Moderna vaccine

Saturday's news on Covid developments around the world

• Thousands waiting for dementia diagnoses during Covid crisis
• Travellers in England to get one-week notice of overseas rule easing
• Canberra condemned over decision for Australians returning from India
• UK's south Asian communities worst-hit in Covid second wave - study
• See all our coronavirus coverage

12.01am BST

That's it for today from the global blog team. Thanks for following our coverage - more to follow in a few hours.

12.00am BST