Stock markets tumble further as oil prices soar above 100 dollars a barrel

London’s FTSE 100 Index joined global markets in tumbling lower after oil prices rocketed above 100 US dollars a barrel for the first time in nearly four years amid a mounting supply crisis caused by the Iran war.The UK blue chip share index fell 1.7% after opening on Monday, down 181 points to 10103.71, after punishing falls last week on the escalating Middle East conflict.