Having read Sundae's post, I was prompted to do a couple of searches about these trees in the locality.
I discovered that there is one near here which I pass every time I go to buy milk and I don't think I've ever noticed it, I am ashamed to admit.
Incidentally, it was mentioned in an estate agent's archived ad for the property.
Street View
Had to go back to a 2011 Street View image to get a decent view, but it's still there. Or was at 0845 this morning.