UNIT says ...
... "Oooh, that looks nice. We'll have one of them. But add on another couple of runways, just in case."
(Note: Sorry, this only makes sense if you have seen the Doctor Who episode "The Sound of Drums". Trust me, you'll understand when you do.)
Captain Scarlet and the Mysterons, written by Angus P Allan, art by Ron Embleton, TV Century 21 issue 148, 18 November 1967, reprinted in Action 21 issue 6, March 1987