This is an old streetview pic from several years ago. The trees are bigger now.
https://maps.google.co.uk/maps?q=Osw...41.85,,1,-1.76
I post this to illustrate that they are all silver birch trees and I think my saying they number 'about 50' is a serious underestimate.
From what I have read, it seems that some places ban their planting in residential areas.
The species originated in Russia, so I am naming them Stalin's revenge.
If I had the energy I would start trying to get them removed/replaced.
They are on LCC land and any action, even if successful, takes too long, and I don't think I would last it out.