Duchess of Cambridge visited a memorial for London murder victim Sarah Everard on Saturday as police warned that vigils to pay tribute and to protest about violence against women would breach COVID-19 restrictions.A palace official said Kate, wife of Prince William, “remembers what it was like to walk around London at night before she was married”.Later on Saturday as night fell, around a thousand people – mostly women – gathered at the site to pay their respects and protest at the lack of security they felt when out alone, with some chanting “shame on you” at police who were present.Police told organizers of events planned in London and around the country to pay tribute to Everard that public gatherings would be in breach of COVID-19.