Banksy prints, handwritten notes, a pair of trainers – and even a collection of “burner phones” – are among scores of items set to be auctioned from “the most definitive archive” of his early work.

Steve Lazarides, the anonymous street artist’s former agent and photographer, is auctioning artwork and other mementos amassed over more than 10 years of collaboration from the late 1990s.

He has held on to his collection since he and Banksy parted ways, but told Sky News it is now…