As a building services engineer - we design school classrooms, offices and domestic living rooms at 21 deg C. Any sleeping areas have a night time temp of 16 deg C.

Cabin crew will be under pressure to keep costs down by ensuring correct temperatures are maintained.

I iusually find when office workers (usually female) are moaning it is too cold, they are the ones wearing strappy tops. Any suggestion to put on a jumper/cardigan is usually met with an indignant look!!