By Xavier Collins Where the City’s movers and shakers get a few things off their chest. Today, Xavier Collins, vice president at car-sharing marketplace Turo, takes The Notebook pen. A low appetite for risk is stalling the UK’s entrepreneurial ecosystemI’ve been lucky to build my career at three unicorns – handing out flyers for Uber, launching markets for Deliveroo as general manager and, with Turo, bringing our marketplace to Europe and now overseeing the UK market as vice president. All businesses shared one defining characteristic – we were told they would never work. The clearest manifest…