The headline is wrong. "Dreams Before the Start of Time" by Anne Charnock is the 2018 winner of the Arthur C. Clarke award: https://www.clarkeaward.com/2018-winner/
They must be referring to the Sir Arthur Clarke Award [1] (for space exploration), not the Arthur C. Clarke Award [2] (for Best Science fiction novel).
it's this one: https://www.clarkefoundation.org/awards/
greetings, eMBee.