if you have trunking in the wall if you end the trunking with a recess box you can have a brush plate to cover the box and let the cables out. you might have to make a trunking size hole in the side of the recess box as they usually just have holes for conduit
ie like these https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjAmpXKh8fxAhWOY8AKHVfvDdQQFjAAegQIBhAD&url=https://www.wickes.co.uk/Wickes-Single-Brush-Face-Plate-White-Plastic/p/204733&usg=AOvVaw3evzHX6cM5ny8nGoDn5oSm
ie like these https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjAmpXKh8fxAhWOY8AKHVfvDdQQFjAAegQIBhAD&url=https://www.wickes.co.uk/Wickes-Single-Brush-Face-Plate-White-Plastic/p/204733&usg=AOvVaw3evzHX6cM5ny8nGoDn5oSm