Visitors to a Nike conference at the centre of a covid-19 outbreak were taken on a walking tour by guides who claim they were not then tested for the virus.The claim follows concerns at a the handling of tracing and testing after the gathering in Edinburgh in February - before coronavirus became a pandemic.It was reported earlier that 20 Lloyds Banking Group staff shared hotel facilities with Nike delegates but were not traced for check-ups.Nicola Sturgeon defending the response during her daily press briefing, saying it was right not to make the outbreak public at the time because of patient confidentiality.Get all the top Scottish politics news sent straight to your Inbox by signing up to our Politics newsletter.We cover Holyrood,