They had a few 'happenings' during the Falklands campaign, notably two Daggers tried to take out the Lynx after jettisoning their external tanks and engaging with cannon.
I suppose the most notable event involving HMS Cardiff was the tragedy which struck the Army Gazelle XX377.
When I went out to Kenya there was an ex-Army chap (Tim Ward-Booth RIP) flying as CP for Freddie Wilcox's outfit - he had been in some sort of 'incident' during the Falklands, also involving a Gazelle, but I was never able to determine exactly what.