Oh look: https://www.independent.co.uk/travel/news-and-advice/flights-uk-australia-four-hours-hypersonic-jet-reaction-engines-a9119521.html https://www.independ

Oh look: https://www.independent.co.uk/travel/news-and-advice/flights-uk-australia-four-hours-hypersonic-jet-reaction-engines-a9119521.html https://www.independent.co.uk/travel/news-and-advice/flights... "FLIGHTS FROM UK-AUSTRALIA COULD TAKE JUST FOUR HOURS BY 2030"