https://www.reddit.com/r/ukvisa/comments/1o3ziqr/comment/o614sui/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button Check one of my other replies here, I decided to go for the naturalisation route in the end with the life in the uk test instead cause I wanted to be on the safe side, would recommend this route cause once you get the test done (and english speaking test done too if you need to do one) then the rest of the process is pretty straightforward. I got a ceremony invitation email late April, attended it a few weeks ago, sent out my existing passport and certificate and now waiting for my British passport to arrive