MARKET REPORT: Testing times at Intertek as shares plummet 5% after firm slumps to a loss of £307.7m in 2015, compared to a profit of £252.2m in 2014

Investors were unimpressed as shares of the group, which tests and clarifies products ranging from shoes to drugs, plummeted to 2858p before closing 139p or 5 per cent down at 2865p.