If your flight to LHR goes out of T2F (the same terminal that flights from the USA use), there is a large Air France Salon that is accessed by stairs and an elevator that are to the left of the security checkpoint exit; you walk through a duty-free shop and food court setup to get there. There are showers in that club, along with both champagne and vodka on ice and the 8 ounce (25 ml) tall narrow cylinder cans of Heineken. You'll also find the AF house cognac, armagnac and calvados. A bracing calvados along with a croissant or pain au chocolat is truly the breakfast of champions.