There was squirrel causing grief in a row of houses near us. It ate the wiring in one loft and the owner called in pest control; then insisted that she didn't want it killed, just everything blocked up so it couldn't get back in.
So the squirrel moved next door.....and this continued until it came up agin a lady who was a farmer's daughter. When the pest control fellow (who was doing all right out of this business) asked if she wanted it left alive, the response was along the lines of, "Hell no, kill it".
End of problem.
I like seeing them, they're fun to have around, but if it get into my house, it's dead. That said, I don't think I'd be happy with that solution if it were a red squirrel, but the greys are just fluffy rats, tbh.
M