Only residents with permits for hospitality venues will be allowed into the city on New Year's Eve and households across Sydney are only allowed to host 10 people. Outdoor gatherings are limited to 50 people.
Britain is one of the 23 countries that India shares an "air bubble" with, as part of temporary bilateral arrangements after regular international flights were suspended after the pandemic hit.
In Dublin, republican Sinn Fein leader Mary Lou McDonald said Brexit had raised "fundamental questions around the wisdom and the sustainability of the partition of our island".