We have new neighbours. They spent about a month doing loads of work on the house (don't know why, didn't look to me as though much needed doing but there has been much drilling, hammering, scraping etc) before moving in a week or so ago I think. They've never been to say hello or to apologise for the noise. We don't want to come across as over friendly. So I'm asking - is it up to new neighbours to introduce themselves, or what? Or are we being unreasonable not to have been round and introduced ourselves to them?