From a tactics point of view, a helo is, IMHO, not the best platform to go after a light ac due to the lack of overtake if the intercept geometry isn't good. Much better would be a Tucano/PC-9 style ac
Hmmm... something you could scramble quickly, highly manoeverable, with an air-to-air capability and a good turn of speed? How about, say, a Spitfire? Based somewhere convenient for the capital of course... maybe Biggin Hill?
