It is very common for migrants with spouse or partner visa to switch into parent of a child visa if their relationship breaks down irretrievably with the other parent of the child. If the other parent of the child does not agree for you to have direct contact with your child, you can apply for Child Arrangements Order application to the family court which can then become a basis to apply for switching into parent of a child visa from inside the UK. Your qualifying time for ILR after 5 years on parent visa route will start from scratch once you switch to parent of a child visa route and the time spent under spouse visa route will not count towards 5 years period to apply for ILR.

If you want to instruct me, my name is Atty Lindoven Magsino, BSc, MBA, GDL, LLM, DBA (candidate), a qualified Solicitor in the UK. Email: don@mbmsolicitors.com or attydonmagsino@gmail.com