Both of these links state pretty clearly that she lives in London. In the UK.
It isn't uncommon for posh famous people to have their posh second, third, etc., residences in places that where normal regular people don't actually live...like Downtown Ottawa.
> It's not "a residential area" in any sense.
World-renowned pianist Angela Hewitt would disagree:
* https://ottawacitizen.com/news/local-news/angela-hewitt-play...
* https://en.wikipedia.org/wiki/Angela_Hewitt
Her living room, with her piano, is in the area.