Hello, thank you for your question. My name is***** am a barrister and will assist you with this issue today.
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Firstly, the "without prejudice" rule doesn't apply in famaily courts when it comes to children matters so you can ignore that!
Court orders in Children Act matters are designed to set out the minimum amount of time a parent can spend with a child. Parents can agree any variations they wish from time to time provided both clearly agree. These agreements are not binding and do not alter the core original order in any way.
So no you are not bound by what you have greed. You haven't accepted a without prejudice offer, you can show it freely to the Family court should the need arise.
Generally speaking the Courts encourage parties to be flexible and "swap" weekends etc. Usually the order provides for this by stating "such further contact as agreed between the parties".
So in summary, you two can agree temporary changes as little or as often as you like. However you are not bound by anything but the actual court order.
If you want to change the court order you'd have to apply to the court to vary it with a C100 form.
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