Does Britain block advanced arms sales to Argentina partly to avoid increasing the cost of Falklands defense?
Short answerYes; preserving a technology advantage lets Britain defend the islands with a smaller force, while Argentine modernization would require more British personnel and equipment.
NotesBritain prefers a small Falklands force with enough technological superiority to defeat Argentina without taking heavy losses. Allowing Argentina to acquire more advanced equipment would narrow that margin and make the islands more expensive to defend. The likely response would be additional British personnel and capability permanently tied to the South Atlantic. The exchange connects arms-export policy to force structure by showing how an opponent's modernization changes the size of the deterrent required.