By Huw Jones LONDON (Reuters) -EY said on Monday it will sever its links with operations in Russia, mirroring moves by KPMG and PwC, two other of the world’s “Big Four” accounting and consulting firms. The Big Four, which also includes Deloitte, audit the books of vast swathes of blue chip companies, often key to obtaining international investor backing. “In light of the escalating war, the EY global organisation will no longer serve any Russian government clients, state-owned enterprises or sanctioned entities and individuals anywhere in the world,” EY said in a statement on Monday. “EY has c…