Slow Horses creator Mick Herron has spoken of his “honour” as he was unveiled last night as the programming chair of the world’s most prestigious crime writing festival.

The internationally bestselling spy writer will take the helm for the 2025 Theakston Old Peculier Crime Writing Festival in Harrogate next July. Supported by the Daily Express, it is the largest and most famous celebration of its kind in the world.

Herron, the bestselling author of the Slough House thrillers which are…