As someone who has broken through the CVD barrier myself I would advise as follows
Do not ask too many questions up front as you will get an array of different answers SO.....keep control yourself by flying the dual hours of night training as normal and then "solo" hours with fellow night q pilot or instructor as P1supervised.
This will allow you to fill in the required form accurately, tick the right boxes and then get some non pilot office bod to issue the new qualification JOB DONE
This is based on "don't ask don't tell"
So what if office bod says but you are day vfr only ?
Then argue that you have filled the requirements in a safe and logical way and that there is no logical reason not to issue qualification.
From my experience do not let them decide up front as most do not have a clue about what is sensible and fair.
The CAA are not that joined up anyway
