I don't know how it is now, but years ago, flying to Europe in the summer meant very JUNIOR flight attendants. Flight attendants bid on routes. The more senior, the more likely you get your preference. Senior flight attendants never bid for August to Europe because the hotels they stayed in before their flight back were not air conditioned.
My third and final ex had to go to London for a meeting, and made the monster mistake of staying in a Holiday Inn near Heathrow. When she called the front desk to ask where the controls for the a/c were, they laughed at her. No a/c here, dear. She deserved it. Should have asked me for suggestions. Don't miss her a bit.