I am almost always way too hot on BA. In F I can usually negotiate a temperature reduction. On a recent flight HKG to LHR, at the front of upper deck A380, the CC serving my area was the type who gives the airline a bad name. Surly to the point of rude and doing the minimal she could get away with. When I asked politely if the temperature could be lowered (it was even hotter than usual) she said that it was fixed and that there was nothing that could be done. She must have thought I was born yesterday.... Later in the flight when that particular CC was on break I spoke to another member of crew who rolled her eyes, agreed that the temperature was higher than usual and turned it down, until of course it went back up again later. We did not see the CSD on either leg of that trip, CW one way and F the other. My partner and I are both Gold. Very different to CX where we are always warmly welcomed by both the CSD and cabin purser.