It's at the entrance of business lounge, missed it the first time. Concorde room is very private, exclusive for First class passengers, very quiet, only couple of guests there , with ala carte menu only
Its located near Tumi luggage shop, take the lift upstairs. The lounge is nice, not so crowded (we arrived just after 9pm). Food choices in business lounge is limited, but quality is good.
It has shower facility but was busy, its better prebooked.