The children's mother is Egyptian. We share custody 50/50 (1 week on/1 week off).
We agreed that she could not take the children away for longer than a month without my agreement (I was worried that she might wish to emigrate). She wants to take the children to Egypt for a fortnight's holiday, but I am worried about the Arab Spring and do not want them to go whilst Muburak's trial continues (as I believe the situation is volatile). She is threatening me with court action and saying that she could take them away for a month, without my consent, anyway. It's a horrible situation, so I would like to avoid it in the future and amend the ruling so that agreement must be sought for holidays longer than a week (to match our custody arrangements).
Then without my knowledge she recently took our children to a class during my custody week, only informing me after she had taken them that I needed to pick them up from school a little later. So I would also like to add to our custody arrangements that she cannot do such things - she needs to seek my agreement to take the children during my week....
You would need to seek a Prohibited Steps Order which is an order granted by the court in family cases which prevents either parent from carrying out certain events or making specific trips with their children without the express permission of the other parent. This is more common in cases where there is suspicion that one parent may leave the area with their children.
She can not take the children abroad without your prior permission - as you have Parental Responsibilities, she must gain your consent for such a a trip.
Child contact and residence issues are separate from the divorce petition. Do you have a shared residency order? If not, I would suggest you look into it.
Custody is an out-dated term, since replaced with the therm "residency", and access replaced with contact.
A Shared Residence Order means that parents are equal in the eyes of the law, in the eyes of the other parent and in the eyes of the children. It means the children live equally with each parent (though it does not necessarily mean an equal split of time spent with each parent) where the parent with residence is the parent that the child is with at the time.