my son and his g/f had a baby boy in febuary this year and

Hello,

Your son has parental responsibility over the child by being named on his birth certificate and Parental responsibility is defined as all the rights, duties, powers, responsibilities and authority which by law a parent of a child has in relation to the child and the child's property.

He should not forcefully take the child from the mother as this could turn nasty and be detrimental to the child and not in the child's best interest e.g. The child could get hurt but he should try mediation with the mother if he cannot amicably sort this with the child's mother or as a last resort, court action.
A CAFCASS officer may be involved in preparing a report about welfare issues to help the court decide what order to make.

Your son should contact the charity Families Need Fathers for assistance
http://www.fnf.org.uk/law-and-information/contact

Hope this helps

Under recent changes, your son must go to mediation with his ex girlfriend before going to court.

http://www.familymediationhelpline.co.uk/find-service.php