No residence order in place

Have an agreement drawn up through my solicitor signed by mother of my son,she demands changes all the time if I don''t agree she refuses me access is this a legal agreement? and is she allowed to do these demands No residence order in place so would I be able to keep my son to live with me?

Just refusing to return your son is a very antagonistic act. It will put you in bad odour with the court and will damage permanently your dealings with your ex. What you would be better advised to do is to apply for a defined contact order. Your agreement isn''t legally binding but it would be something the court would take into account as setting a bench mark. A court order is binding, although enforcement is not always straightforward.