The risk to NSW and Australia of mutated and especially contagious COVID-19 strains will not go away, NSW Premier Gladys Berejiklian said. NSW Premier Gladys Berejiklian says Australians should assume mutated COVID-19 variants emanating from the United Kingdom and South Africa will become the world’s dominant strains due to their contagiousness. She also believes mask usage will be mandatory for the foreseeable future. NSW recorded one new locally-acquired case of COVID-19 in the 24 hours to 8 p.m. on Friday, as all of Australia faces an anxious wait to see if the highly-contagious UK version of the virus has spread from Brisbane. The single local infection was a contact of a case linked to the Berala cluster, which now numbers 21, and came from more than 25,000 tests. There were also five new cases in travellers in hotel quarantine. On Friday, Queensland Premier Annastacia Palaszczuk announced Greater Brisbane would enter …