Two serious Covid-19 breaches in Adelaide’s city centre have put authorities on high alert – but both have been ruled out as any risk to the community. Adelaide bus, tram and train tickets look set to go digital, with the state government calling for proposals for a QR code-based ticketing system.New data shows more than 10 per cent of homes sold in South Australia in the 12 months to June were bought by interstate buyers.And in sport, Adelaide coach Matthew Nicks says time will tell if Taylor Walker plays again next year, but he hopes the former Crows captain will soon be able to sit down and talk with the team.For updates and breaking news throughout the day, take out a subscription atadvertiser.com.au