Consultancy says companies quoted on London stock market issued 65 in three months to end of September The number of profit warnings from UK-listed companies has risen to the highest level in two years, as the war in the Middle East triggers a surge in costs for businesses before the budget. With less than a fortnight before John Healey’s tax and spending statement to the Commons, the consultants EY-Parthenon said companies quoted on the London stock market had issued 65 warnings in the three months to the end of September.