This is seen in a survey by the magazine Financial Director which shows that for Britain's FTSE 100 companies, non-audit fees paid to the big four - Deloitte, Ernst & Young, KPMG and PriceWaterhouseCoopers - plunged 28.6% last year to £454m. Even so, they are still almost double the fees that the big four earn for audit work, which come to £238m.