Great news,
The appeal for my Derivative rights application has been allowed
That is besides the fact my daughter grandparent and father are British. The father does travel out of the country often though.
The home office seem to cite Harrison (Jamaica) v Secretary of State as their go to for refusal in the courts and I understand the most likely reason that a Zambrano appeal is likely to be refused. In summary the main focus seems to be that as Zambrano Carers are not forced to leave the UK at the time of their application and the British/EU citizen is not obliged to leave the UK. Also, it needs to be shown
the quality of life of the EU citizen will be diminished if they continue to reside in the UK
May I suggest that you focus on demonstrating how your British/EU citizen child/dependant adult life would be greatly diminished if left in the UK without you, also the British/EU citizen you would have to leave the child / dependant adult with, you need to show how their quality of life would be greatly diminished if your child was left with them.
And the best interest of a child must be considered in all applications to the Home office and in the tribunal courts, regardless of the HO refusal letter refusing to consider this.
Disclaimer: This is all in my opinion, based on the researched that I've done.
Now, I await the Home Office to either appeal or issue my documents. I notice some people wait many months, some wait over 5 months after wining their appeal before the UKVI issue their documents. This is so unfair.