article_snippet: With an average flight time of somewhere between four and eight hours - thanks to the help of Voyager air-to-air refuelling tankers accompanying the militants on each mission - the total cost quickly racks up to around £26.5million.
article_snippet: The missiles cost £105,000 each and account for another £5.67million spent hunting down members of the barbaric group.
article_snippet: The heavier weapons are used on larger targets and cost £22,000 each.
article_snippet: The drones are being fired upon and cost £46,000 a unit.
article_snippet: The full £37million fight against ISIS does not include the costs of flying the drones, which are each worth around £8.5million, as their operation is shrouded in secrecy.