I don’t get it...
The scenario you describe and suggestions from your solicitor and her solicitor run contrary to my knowledge of UK family law and everything I read about it.
I don’t get all the drama. There is a system in place to deal with these issues. You are not the first person dealing with custody issues and your WW actions are not unique. This can be stopped and there are processes and procedures to end this all.
First of all: In the UK it’s not the parents “rights” that are paramount in custody disputes. The law views the child’s rights to have access to BOTH parents and the decision is based on the child’s benefit and NOT the parents. The ideal solution is joint custody with a reasonable and sensible agreement on prime residence, visitation and so on.
Second: The Court expects and wants parents to have hammered out this agreement BEFORE the court date. The role of the judge is simply to assess that both parties are in agreement and that the child’s rights are protected. In fact a judge will HEAVILY frown on a frivolous, non-grounded or unfair demand because they basically waste court time, the time of social workers and others that are then called on to assess the situation.
Third: Without an agreement the basis is shared custody. So right now YOU have the absolute same legal right to have access to your children as she does. Any breach from that that is not consented to is simply put breaking the child’s right to access to both parents and should be dealt with by the police.
Fourth: If you are not a drunk, drug-user, a registered sex offender, have a recent criminal record, doing time in jail, abusive, have mental issues or a Manchester United fan (or any combination of those) then neither your ex, a judge or her solicitor can limit your children’s right to have access to you.
Fifth: I take it you are in the family home. Therefore I take it your kid’s LEGAL residence is there. She can’t change that without your approval. So either it’s still there or she changed the residence without your approval – a clear break in the law and something you can and should have reversed.
I don’t know what your solicitors are suggesting you do but I would be seriously surprised if it’s ANYTHNG other than this:
Do not sign ANYTHING. Not even under duress.
Reply with as little as you can if at all when she sends these mails.
Make sure the children’s legal residence is the family home. If not then discover how and when that changed and counter it.
Make a reasonable formal offer on shared custody.
Any arrangement in place today: STICK TO IT. Don’t be 20 minutes late, switch dates, phone the kids when they are with her and so on. Get a plan in place and STICK TO IT.
Have your attorney send a one-time letter stating that if your legal rights and your children’s legal rights to have mutual reasonable access is hindered you will take direct legal actions that might include formal charges and the correct authorities (this includes having the police help you get the kids).
[Get your solicitor’s input on this but I would also suggest you add a clause stating that if your WW solicitors keep sending such provocative letters that contain demands that impede your children’s rights to access to their father you retain the right to notify the correct authorities and/or professional ethics board]
I’m quite certain I’ve suggested this before: In the UK there is a very active and vocal father’s rights movement. Go online and find one with a help-line. You NEED local support from a group like us here on SI that has been there and worn out the t-shirt.