(Reuters) - British recruiter PageGroup Plc reported a small drop in gross profit in the fourth quarter as it grappled with economic and political uncertainty in China, the UK and France, while a weaker pound also dented earnings.Gross profit in the quarter fell 0.4% to 205.6 million pounds ($266.70 million) on a constant currency basis. The company said swings in foreign exchange rates hit its gross profit by 4.6 million pounds.