Hey sorry to bug you again…
So I listened to what you said about child theme’s and started again, installed a plugin that creates a child theme set it up and used the codes you provided in custom css.
While it has removed the bottom and sides of the box around the edit button there is still a grey line where the top of the box would be. I’ve tried different codes relating to borders but I cant seem to remove it ??
Once again thank you for your time and help