Partridges (but no pear tree)

We are in North London, and spotted some unusual birds in our garden last week, which looked like some kind of fowl. We've seen them several times now, including this morning, and after some searching, we realise they are Partridges. Have never heard of them being found in urban environments. Is this unusual?
0
Posts
Are they Grey partridges or French partridges?
Or could they possibly be someone's escaped quail?