Siddall will take up the role this autumn, becoming the first-ever woman to hold the position

Siddall, the global director of Frieze fairs, has been at the firm for 18 years. She will leave after the Los Angeles event this February but remain on the board

Frieze magazine publisher Rebecca Ann Siegel appointed director of Americas and content and will oversee the New York and Los Angeles fairs

Georgina Adam speaks with three leading art world figures on the key events of last year and what 2019 may hold