Sorry, I didn't mean to respond to this.
I'll opt out for others.
Thank you for your question
My name is Clare
I shall do my best to help you but I need some further details first
How long have they lived in England?
Were her plans to work abroad considered at the time of the Custody battle
Are you sure she is permanently working in Switzerland?
Are you up to a battle to get the children again?
In that case there is little option but for the boys to go to Boarding School.
You can if you wish make an application to the court in England for a Prohibited Steps Order to prevent the change of school - and say that if she still wishes to take the job abroad then the children should move to live with you.
This is something that a court would support - or alternatively you can have it written into the Order that she alone will be responsible for the fees
Please ask if you need further details
It is indeed English Law that applies.
She is not breaking any law as such - she has to consult you on the move - she does not have to have your permission to make it.
It is only if you obtain a Prohibited Steps Order regarding the move that she is in Contempt of Court of she goes ahead
In fact if she wishes to go out of the country for less than 28 days she can as she has a residence order - it is only if she wishes to go for longer she needs your permission
I am afraid that she need only consult you on the other matters - it is then up to you to apply for a prohibited Steps Order if need be
You are welcome I hope all goes well