|Marquez battles Rins at Silverstone last year|
The British and Australian MotoGP races have been called off for this season, bringing the total number of race cancellations in 2020 up to five.
"We're saddened to have to announce the cancellation of these iconic events after finding no way through the logistical and operational issues resulting from the pandemic and rearranged calendar," Carmelo Ezpeleta, CEO of Dorna Sports, said.
"Silverstone and Phillip Island are always two of the most thrilling race weekends of the season, with both tracks never failing in their promise to deliver some of the closest racing in our Championship.
"On behalf of Dorna, I would like to once again extend my thanks to the fans for their understanding and patience as we wait for the situation to improve. We look forward to returning to Silverstone and Phillip Island next year for more incredible battles."