Oil prices jumped about four per cent on Tuesday following reports Iran was preparing to launch a missile attack on Israel. Brent futures were up $2.50, or 3.5pc, to $74.20 a barrel by 11:50 a.m. EDT (1550 GMT), while US West Texas Intermediate (WTI) crude rose $2.54, or 3.7pc, to $70.71. Israel’s elite units launched limited ground raids into Lebanon, as Hezbollah, an Iran-backed group in L