The veteran ad sales chief's surprise departure raises questions about her own future, and the future of the platform ...

The FTSE 100 index closed down 34.54 points, 0.4%, at 8,941.12. The FTSE 250 ended down 81.45 points, 0.4%, at 21,613.25, but the AIM All-Share rose 0.42 of a point, 0.1%, at 773.55.