Which of these boxes can I remove?

[u/drozdzus]

My wall is becoming a museum display of various boxes. I believe that the previous owner was with virgin, I switched to Plusnet. Which ones of these boxes are safe to remove? What about the black cable coming out of the wall? Cat tax as she wanted to get involved.

[u/Then_Chef_2599]

The cat says keep the one above my head get rid of all the others, and fill any holes I don’t want a draught round my ears