You have my sympathy LadyM. My neighbour vac-ed her house top to bottom at 8:30 every morning for 9 years, until both her DCs went off to high school... Since then it has been 8:00 every morning for a decade and a half!
I don't always sleep well at night (as you can see) so there have been many mornings over the years when her vac has woken me, and I could have wept.
I now have a teenager and though he is often awake late at night, I don't let him make noise. It's volume down on TV/music after 11pm at the latest. I used to have a dodgy boiler that sounded like a rocket launching, too, and I even went so far as to wash in cold water before I went to bed, so as not to disturb the neighbours.
Neighbour noise is stressful, and it's just friendly to try to be considerate about other people's sleep, even if they do it at different times than you. :)
BTW, has anyone else noticed that nocturnal 'night owls' are expected to be quiet, and their noise is considered anti-social... But early-birds are considered industrious and their dawn/pre-dawn noise is somehow morally superior acceptable?! 