Too far back to remember exactly, it was either Dec 1989 in Gatwick en route to DRC or Terminal 4 in Heathrow en route to Singapore Jan 1990. The reason I am struggling to remember is, did I actually use the lounge on my first long haul business class flight, did I even know about it's existence. At the time it was fantastic but obviously over time it's significance has diminished or is it only my memory that has diminished.