Friends have paid tribute to the mother-of-one, named locally as 22-year-old Namara Whisker, who died in the early hours of Saturday when the car she was travelling in plunged into the River Avon.
The former business studies student, from the Easton area of Bristol, was described as "the kindest person you could ever meet".
School friend Shawnika Sergeant, 22, said: "She was so pretty, bubbly and a special girl. I could not believe it when people started texting me. I have known her for so long, it is hard to take."
More top news
Charities warn that sitting down too long can lead to health risks such as type 2 diabetes and cardiovascular disease.
The Labour leader will use a speech to set out the differences between his party and the Conservatives with particular emphasis on the NHS.
Kate will join Prince William on a tour of the Stephen Lawrence Centre before visiting a charity working with disadvantaged young people.