There are a few recorded mentions of UK forces contact with an Argentinian 707 (they had 3 at the time) during Op Corporate on the net. On 21 Apr 800 NAS sent up a sidewinder armed Sea Harrier to warn one away from the task force, on 12 May 201 Sqn made contact (as already mentioned) and on 22 May HMS Cardiff launched some Sea Dart missiles at one of the aircraft, which she evaded. They apparently didn't bother UK forces again after that.