Balkans actually. We didn't lose any Harriers in the Falklands.
Sqn Ldr Bob Iveson would disagree when his Harrier was shot down at 100' @ 450kts!...

I think we lost a total of 9 or 10. 4 Gr.3 (3 to enemy ground fire, one engine failure*) and the others were SHARs (2 ground fire/SAM, 1 exploded after take off, 2 are thought collided whilst on a night CAP, and one fell off it's ship whilst waiting to take off)...
*It was forced landed by its pilot, who, 20 year later was to be Chief of the Air Staff...
What was amazing is that in 25 years of service, including a war against a not under equipped air force, the Sea Harrier never lost in air to air combat...