PickleSarnie, I don't really get your POV.
Do you really think that at 38 weeks pregnant in the boiling heat being bashed into and not given a seat is the best thing for your physical health and that of your baby just because you don't have some life-endangering pregancy-related condition?
. Is it really princessy to realise that actually, whether you feel physically fine or not, there are greater risks to overheating or being bashed into when you are heavily pregnant than if you are, well, not? The discomfort is only one aspect. Unborn babies don't like those conditions, whether or not you think they are AOK, and though yes, in most cases mother and baby will be fine etc etc, it wouldn't really kill someone who is not pregnant or with another alternative reason to be more physically in need of a seat to offer it up.
God. I threw up until 24 weeks. That's 6 months. I never had to ask for a seat luckily as I am not in London but to think it's considered princessy or entitled to want to sit down when you are in discomfort or poorly seems nuts to me. I absolutely agree that everyone should try to be nice to those around them when they can, no one knows when they might need the favour return and besides, it's just nice.
Also, to be fair, you DON'T know how you'll be at 8 months pregnant. I have SPD this time. Not a trace of it last time, was walking 4+ miles a day right up to birthing.