Ascot’s chief of staff Costello to exit after 20 years Rachel Dalton, Catrin Shi 22 June 2022 Twitter LinkedIn Email Show more sharing options Share Close extra sharing options Twitter LinkedIn Email Copy Link URLCopied! Print Ascot’s group chief of staff Yvonne Costello has resigned, this publication can reveal. To unlock this article Register for a free 14 day trial Already a subscriber? Login now