Found on domestic premises (2nd floor bedroom) in Edinburgh, Scotland
Hi, this looks like it might be one of the Lace-web Spiders (Amaurobius). I’m not used to seeing them with the abdomen quite this swollen though (possibly gravid) making it look a bit different, so I may be mistaken.
Thank you for your comment. Having checked images of other Lace-web spiders I agree that this one must be one of those, although I have not found any images of Lace-webs with such a blue abdomen. The colour however may be due to the cold daylight shining through a window behind it.