First thanks for all the help here, I managed to get naturalised!

Now it is my wife's turn.
However, she had to break the continous living condition for health reasons about 5 years ago. Now the time has come, and in the past five years [thanks to the pandemic :/], there has been no issues regarding that rule.
I have few quick questions:
1. Does my dependant require a "NARIC letter" confirming her overseas degree?
2. I remember that the application had to be submitted when she was actually in the country exactly 5 years before the application. Is that still the case?
3. Apart from council tax and utility bills, is there any other way to prove cohabitation? We don't have joint bank accounts for example, just Council tax and utility bills.
Thank you.