Tough new COVID-19 rules have been introduced in South Australia for the next week as authorities scramble to stop the dangerous “Delta” strain from spreading into the state.Train drivers are in a race against the clock, being instructed to skip railway stations, leaving commuters stranded on platforms, in a bid to reach their final destination on time.Mount Barker’s home-building industry has recorded a bumper year, with dwelling applications increasing by 117 per cent since July last year.The Brisbane Lions will fly to Melbourne on Wednesday to ensure their  clash against the Crows at Adelaide Oval goes ahead on Saturday.For updates and breaking news throughout the day, take out a subscription atadvertiser.com.au