NSW has recorded nine new locally-acquired cases of COVID-19 as authorities implore Sydneysiders to think twice about attending Boxing Day sales. Nearly 40,000 people in NSW turned out on Christmas Day for testing, Premier Gladys Berejiklian told reporters on December 26, with nine positive results. Another six COVID-19 cases were uncovered in the hotel quarantine system. Eight of the nine local cases were connected to the northern beaches cluster – six of which were household contacts of prior cases – while the Bondi-based ninth case may be a false positive test result. That person has no connection to the 116-strong northern beaches cluster, the source of which remains unclear. “We know today the strategy we have in place is working and I want to really thank everybody for trying so hard and working so hard during what is often a time when we are all coming together,” Berejiklian said. Berejiklian …