Many thanks for the further posts all advice is most welcomed.
The problem I have with the situation is I am from Scotland my ex dw is from the area I live in at present (as is nearly all of her family). My family remain in Scotland where I cannot get a lot of time to see my Dad, who at 75 years old and with Prostate Cancer and having just falling out of the attic and I worry about all the time, or my brother and his wife and DS and DD.
As I mentioned, My new partners family is all from around the area we are in now.
It would never be a rational decision when I have a new family to uproot my partner and child to be from everything they know, for me to leave a well paying and secure job in a metropolitan area to go to the sticks where there would be nothing for my new family.
My ex did not cope well when she move to scotland to be with me as she became very homesick - this is only 5 years ago. So I left everything to move down here where I have no blood relatives.
I was wholly ostrecised from her family following a separation which left me with no-one apart from my 8 week old DS. I would estimate that 75% of men in my situation would have left and returned home. I didn't, I stayed here for my son.
I have genuine fears that she is doing this for all of the wrong reasons. Unfortunately for my ex our DS is the only child she could have due to a medical condition, so I fully appreciate that she would wish our DS exclusively - but that is not in the interests of our DS, neither is creating a difficult situation to maintain contact with his half brother or sister, his dad and his extended paternal family who he has only seen on the odd occassion is over two years.
A good example of her behaviour is that my dad came down to see me following separation (he is one of the most decent men I know) and was here for 3 days. I asked her family if they could arrange some time for him to see my DS - they didn't. MY ex's parents have 10 grandchildren - my own mother has passed away and my DS is my dad's only blood grandchild (my brothers children are adopted).
While you may argue that this followed close to separation and may be understandable due to tensions involved, just last August when I started getting my DS overnight my dad had arranged a family holiday with himself, my brother and family and me my new partner and my DS. My ex was aware of this 5 months before it happened and tried to change the date a fortnight before we were due to go.
I have never seen my DS at Christmas or her birthday and really, what kind of mother 2 weeks before Christmas hands their child's father a letter telling him that she is moving 160 miles away. It coudl so easily have waited until the New Year.
I honestly am not the one that is angry and bitter in all of this but I can see this being a very difficult problem to resolve. I do not know her new partners status but if he does not have children it is them that should be considering to move to this area. That is what I would do in that situation
All of your posts are welcomed but sometimes it is easy to criticise one party when you don't know the other.