I think I've read that one of your rights when pregnant is to rest breaks - I teach in a college so on feet in class all day,sometimes don't get out at break time but there is no staff room or anywhere comfortable to sit (only desk, or sofas in public parts of the building so covered in students and not really suitable for knackered pregnant women).
We don't even have a sick room anymore, which was where I used to put my feet up in last 2 pregnancies. I have asked my line manager but I know she will have to check with HR so no idea when I'll get an answer.
Does anyone know about this, have any experience or can you even recommend a website or something where I can find out more? Thanks!