If you were married at the time of a child's birth, your ex automatically has 'parental responsibility'. He'll also have parental responsibility if the child was born after ***1st December 2003 and you jointly registered the child's birth, OR if you've entered into a formal parental responsibility agreement with him, OR if a court has awarded him parental responsibility
(**** That date applies if you're in England or Wales. For births registered in Scotland it's 4th May 2006. For Northern Ireland it's 15th April 2002).
Assuming that your ex has parental responsibility, then BOTH of you have the right to be involved in the following:
providing a home for the child ;
having contact with and living with the child ;
protecting and maintaining the child ;
disciplining the child ;
choosing and providing for the child's education ;
determining the religion of the child ;
agreeing to the child's medical treatment ;
naming the child and agreeing to any change of the child's name ;
accompanying the child outside the UK and agreeing to the child's emigration, should the issue arise ;
being responsible for the child's property ;
appointing a guardian for the child, if necessary ;
allowing confidential information about the child to be disclosed ;
http://www.direct.gov...entsRights/DG_4002954
Also (assuming that your ex has parental responsibility), if you have a residence order for each of your children, you can take them out of the country for up to one month at a time, without your ex's consent. (Attempting to take them abroad for a longer period, without his consent, is a serious criminal offence). If you don't have residence orders for all of your children it's illegal for you take your children out