How do I get the diverter out it is ceased in to the mount tried a pair of pliers sacred may brake the hosing or diverter thanks norm

Do you have any idea which model or brand you have? Postuing a picture would be helpful, we can help if you are not sure how to post.

Sorry they are galt master really old do not know model

Tell us more about your shower valve.
One handle or three knobs,(see image) Why do you wish to remove the diverter? We need more details before we can help. Back tom you, Tom