Really could do with some help.

[Charlie7000]

So sorry. This really annoys me when someone thinks they can stop a Dad seeing his child. I'd be tempted to move back in and tell the Mother in law to mind her own business (you probably did that already). I don't know enough about the legals but would definitely see a Solicitor and ask about residency so your child can live with you. If you want that. Could you move to Holland and work there otherwise? You can get a copy of the birth certificate if you need it.

https://www.gov.uk/order-copy-birth-deat...ertificate

I would definitely get legal advice asap. It's almost abduction - except that you moved too and then moved back so not sure how that counts.