This is not a great photo; it's of a Black Squirrel, a native of Letchworth; I had a brief glimpse of it out of the corner of my eye, so I just clicked without the time to compose the shot; therefore, it's a tad out of focus!
If I get a better opportunity will post a better image.
Thank you, these squirrels are quite common, but shy. Thank you for taking time to comment, it’s always appreciated.