Ooo I don't know mm , first timer but if in doubt I always ring with a 'I'm just checking' disclaimer - can't hurt to let them know there's another baby on the way??! All the best!
toomany, my mum (in Scotland - only stirling though) was really surprised 'they're letting me go as far as the 10th Dec' and consequently visit plans are back tracking from mum and dad coming for an initial day/night visit then mum maybe coming for longer when Dh back at work to just mum then dad after (due to dog) and now - as we're in December which = snow,xmas and 'terrible travel issues' I'm not even sure any of that's going to happen! Did point out a day trip on the train (to newcastle) is feasible. Actually I do understand her worry, we lived in the peak district and got routinely snowed in for years (even out once) but I think a November baby fitted much more neatly with her plans.
I'm resigning my self to 10th Dec, then anything else earlier is a bonus - plus I get to do some artwork / card printing, a totally sure fire way to bring a baby on!