I am the sort of neighbour who would complain, and have done on numerous occasions
Apparently (at least in Greenwich) there are no timing bylaws for when you have to stop
making noise but any noise at any time that disturbs neighbours can be considered as
a nuisance. Admittedly I only complain about loud music poomphing out at 3am and
unsecured doors banging all night but I'd consider getting stroppy about anything that
interferes with my quiet enjoyment of my property.
What would stop my bleating would be for you to put a note through my door letting me
know that you will be sanding your knife and that's what the noise is, also that you're
planning to stop at some time in the future! This lets me know that someone has
considered that their noise might concern me and that's probably enough to mollify
me
You could invite her round to have a look - I'd be genuinely fascinated to see craft being
done. If it's just a weird disembodied noise that seems to have no end, it's very unsettling.
Obviously it's going to be a self-limiting noise but it doesn't always
feel like that when
something seems to be going on and on.
What I think you'd want to avoid is having a situation where someone is monitoring your
noise output at various times and reporting it to the council. Every time I've complained
about any noise the council send me a noise diary - I never fill it in as it's usually a one-off.
I like peace and quiet, me - call me a freak but...
At this moment I have tiny little aircraft whining overhead in Blackheath - I'm not going
to complain though as they're absolutely lovely; I think they might be taking part in a
competition.
EDIT: They're in the Red Bull race at O2 dome which takes place not far from my house.