The 95-year-old’s remarks were picked up on the event’s live stream.
Referring to Cop26, which she is due to attend alongside Princes Charles and Willian, the Queen said: “Extraordinary isn’t it. I’ve been hearing all about Cop, still don’t know who is coming, no idea.”
“We only know about people who are not coming. It’s really irritating when they talk, but they don’t do,” she added, using her gloved hands to gesture as she spoke.
Miss Jones replied: “Exactly. It’s a time for doing – and watching your grandson [the Duke of Cambridge] on the television this morning saying there’s no point going to space, we need to save the Earth.”
The Queen then smiled, before saying: “Yes, I read about it.”
Prince William had appeared on an episode of the BBC’s Newscast podcast, criticising the current rush for space travel among some of the world’s richest businessmen including Amazon founder Jeff Bezos.
“We need some of the world’s greatest brains and minds fixed on trying to repair this planet, not trying to find the next place to go and live,” the senior royal said.
It came as several world leaders failed to confirm if they will be heading to Glasgow for theclimate change talks, which are scheduled to begin on 31 October for two weeks.
Australia’s prime minister Scott Morrison, China’s president Xi Jinping and Brazil’s Jair Bolsonaro have all refused to clarify their position.
Vladimir Putin is currently on the list of non-attendees though it has been suggested the Russian president might send an envoy.
Buckingham Palace was not immediately available to comment.