TV presenter and YouTube star Emily Hartridge has been killed in a crash involving her electric scooter and a lorry.
The 35-year-old was pronounced dead at the scene of the crash, less than half a mile from her home in Battersea, south London on Friday morning.
It is believed to be the first fatal collision involving an electric scooter in the UK.
Emily had more than 340,000 YouTube subscribers to her channel, which offered health and lifestyle advice, after she made a name for herself with the online show 10 Reasons Why.
She also had a big presence on Twitter and Instagram, fronted a 4OD documentary on turning 30 and campaigned on mental health.
A statement on her Instagram page said: “Hi everyone. This is a horrible thing to have to say over Instagram but we know many of you were expecting to see Emily today and this is the only way to contact you all at once.
“Emily was involved in an accident yesterday and passed away. We all loved her to bits and she will never be forgotten.
“She has touched so many lives it’s hard to imagine things without her. She was a very special person xxx.”
Davina McCall was among the first to pay tribute, saying: “My heart goes out to Emily’s family and friends. Such a shock. Sending you love and prayers.”
Made in Chelsea star Ashley James said: “Sending you all so much love. So devastated.”
Calum Best wrote that he was “so sad and so sorry” after hearing the news of her death.
TV historian Greg Jenner tweeted he was “deeply saddened” by the death.
“I met @emilyhartridge on a train 5 years ago, and by the end of the journey we’d shared all sorts of things about our mental health and insomnia,” he said. “She was funny, kind, and open-hearted.”
Police are appealing for information about the crash and have asked anyone with dash-cam footage to come forward.
A Scotland Yard spokesman said: “Police were called at 08:36hrs on Friday, 12 July to reports of an electric scooter being in collision with a lorry at Queenstown Road, junction with Battersea Park Road SW8.
“Officers and London Ambulance Service attended. A woman in her 30s had suffered serious injuries and was sadly pronounced dead at the scene.
“Anyone who witnessed this incident, or has any dash cam footage is asked to call police on 101 quoting CAD 1979/12 June or Tweet @MetCC.”