Sir Martin Sorrell: Clients ‘cautious’ as S4 Capital’s income tumbles

S4 Capital, Sir Martin Sorrell’s advertising giant, recorded a sharp drop in revenue in its first-quarter trading update as geopolitical tensions weighed. The firm posted a 11.4 per cent slump in net revenue to £148.3m, which it said reflected the “continuing technology client caution” and headwinds from one “key client”. Takings from marketing services reduced [...]