NHS staff say they are "near breaking point" as they deal with the rapid rise in Covid-19 cases, a minority of conspiracy theorists are stalking hospital corridors at night, making videos that they claim "prove" that hospitals are empty.One man menaced security guards at the Nightingale North West hospital in Manchester, demanding to be shown "where all the dead people and sick people are".In another shocking incident, a conspiracy theorist sneaked into the children’s ward of the Princess Royal University Hospital in south-east London late at night, filming areas of the hospital that would not be used for ICU patients, such as outpatient corridors and waiting rooms.One conspiracy theorist posted a video recorded in the main reception area.