This info is from a medical study to make hospitals aware of the dangers. Obviously the findings also apply to surfaces that will have been touched using public transport, shopping (trolleys, escalators etc), holiday lets, hotels, gyms, surfaces at work, viewing houses for sale, visiting people, HMO's, etc
Remember Coronavirus is asymptomatic, the a means without, so people can have it without showing any symptoms, possibly for up to 21 days (That's what I've found from studies abroad but UK government suggest less, maybe to avoid more panic).
"Coronaviruses, like other disease-causing microorganisms, can linger on common things that people hold. The virus can spread through hands and surfaces, including door handles, telephone receivers, elevator buttons, call buttons, bedside tables, and anything patients in hospitals frequently touch.
The team has found the novel coronavirus can stay up to nine days on common surfaces, based on their comprehensive analysis of studies about similar pathogens, such as the SARS coronavirus and MERS-CoV. The results show that the viruses can persist or survive on surfaces and remain infectious at room temperature for nine days, with an average lifespan of four to five days.
The team also found that low temperatures and high air humidity levels further boost the coronavirus’s lifespan."
www.news-medical.net/news/20200211/Coronavirus-can-live-on-common-surfaces-for-nine-days-how-to-kill-it.aspx