Am I right in thinking that the service jacket is more a sort of purple colour and made from the same material the girlies uniform jacket is made from? If so then I've seen one once in all my time in BA, and that was being carried, not worn. Frankly I think you should wear the jacket at all times as it hides those nasty sweat marks. If you get hot you can put some ice in your pockets!
Bigmouth - the girls are wearing heels and nylons for no other reason than to taunt me.
nomdeplume - Do you know how to work the on-board defibrillator? Cos I don't. If you knew the full details you'd probably realise the cabin crew exercise their safety roles a little more regularly than you think. There are plenty of medical emergencies around, occasional fires and lots of strange vibrations and loud bangs from the tail end on rotation that the flight crew don't know about. Its a very eery feeling flying a pax jet without cabin crew.