 AgustaWestland have since made several upgrades to Britain's Apache fleet. In May 2005, a $ 212 million contract was awarded to equip all 67 Mk1 helicopters with the Apache Arrowhead sensor system upgrade, to be completed by 2010. In 2009, it was announced that AgustaWestland was also integrating new external fuel tanks with ballistic protection. Some of the internal fuel tanks can be removed, Apaches in Afghanistan may have these removed to allow for extra ammunition for the cannon to be fitted. It has been suggested that advanced rotor blades and additional controls to improve the agility of the aircraft may be fitted in a mid-life update of the fleet. There is also a proposal to upgrade WAH-64s to the AH-64E Guardian standard.
