No interactions present.
Could it be a fieldfare or is that even odder?
Variation in the colour of female (and some young male) Blackbirds is quite wide and at this time of year there are many continental birds around, often showing brighter reddy-brown tones and scaly edges to the breast feathers. The white throat is unusual, though, and seems to be an element of albinism in this bird.
My Flickr photos...
Lat/Lng: 51.7, -2.8
OS grid ref: SO4510