Clark's job has gone as Dentsu has decided to bring international in house. Maybe WPP has decided Bulchandani is the best person to run what is still an ad-based network (Ogilvy is still almost a holding company in its own right.) Maybe Main has decided adland isn't a long term prospect for him. What's certainly true is that running a big ad network over the next 18 months to two years won't exactly be easy street. Budgets are under pressure as the global economy is battered by high inflation. The share prices of the holding companies are entering dangerous territory too – WPP is now valued at just over £8bn, about half what it was in Sir Martin Sorrell's last days even though its performance seems pretty good. Ogilvy itself has done pretty well too, this week winning SC Johnson creative with WPP sibling VMLY&R. But there's no doubt the pressure is well and truly on at the holding companies.