Oh look, it's another question from me, how exciting. Was wondering how you lovely lot deal with visiting the whirlpool / sauna at the clubhouse in LHR. Do you take swimshorts or the female alternative with you and then just put them in your hand luggage for the rest of the flight?! I worry about getting a wet mac leaving my swim shorts in there... but not as much as I worry about whirlpooling in my jeans!
They have a spinner thing that almost dries your swim wear when you have finished. I just bring my own shorts (or you can buy them in the Clubhouse) then pop them in a small plastic bag in my hand luggage once finished with.
Regards