The adventure specialist will shut its global HQ in Melbourne for the day so staff can join the movement. Intrepid’s UK base will remain open, but staff are free to attend and support Climate Strike activities if they wish.

In an open letter, Intrepid chief executive James Thornton said the world had reached a “pivotal moment” in the fight against climate change, adding “definitive action” to tackle the global climate crisis was critical.

“Children around the world have been leading the way through the Climate Strike movement, and now is the time for adults – and business leaders – to stand up and support the call for immediate action,” said Thornton.

“We firmly believe there are positive solutions available – but change is happening too slowly. We need individuals, businesses and governments to work together to make change happen.

“This is especially true now, when short-term decision making is putting future generations at risk. We want to send a clear message that we stand in solidarity with our children, and that we demand immediate action.”

Strikes are planned in 120 countries and organisers expect hundreds of thousands of people to protest their governments’ “inaction” on climate change, said Intrepid.

Agents can find out more about Intrepid’s Climate Strike plans via its dedicated Intrepid Loves Agents Facebook group.