Having looked at the
Heathrow lounges post from the sticky, I see that in Terminal 3 there are showers in the AA flagship lounge, the Cathay first class lounge, and in the BA lounge complex.
I'm flying into Heathrow longhaul, with an onward BA flight from T3, and I've got BA Gold for another few weeks, so I think I can visit all of those lounge
So, that leads me to a question - which one is likely to have the nicest showers, and which shouldn't have queues on a Saturday early afternoon?