The winner of an “unprecedented” literary double has said he will not accept his latest £50,000 prize until the sponsor shares a plan to reduce its “investment in fossil fuel extraction”.

Richard Flanagan has been named the winner of the 2024 Baillie Gifford Prize for his memoir Question 7 – a decade after being awarded the Booker Prize for fiction, for his sixth novel, The Narrow Road To The Deep North.

The 63-year-old is the first author to win both of the prestigious…