Elon Musk’s plans to charge for blue ticks: our tech reporter Simon Hunt dissects the story. First Lady of Ukraine Olena Zelenska calls for help from the tech community at Web Summit. The tiny microscope designed to help speed up breast cancer treatment. Plus:

• Majority of gig economy workers ‘feel under threat from review websites’
• SpaceX launches its powerful Falcon Heavy rocket 
• Google updates home page with Lens image search 
• Exercise in the afternoon or evening ‘may be better for blood sugar control’
• The best spots in the UK to watch bonfire night fireworks

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