Hi guys i have another question. My Fiancé situation is working and currently living with her nan and that house own by my fiance's nan. Is it possible we apply my spouse even my fiancé living at nan. Any tips for that pls. He told me he provide a letter from nan. Advice pls. Thank you.
Yes that would be fine, when sponsors are in shared accommodation as in your case it is a good idea to submit a letter from the owner of the property giving you permission to stop there. It is also a good idea to have a survey done of the house to prove to the UKVI that there is enough room in the household to accommodate you without overcrowding.
Agree with the above. So long as you have written permission of the property owner that you can all stay there, that you have copies of the documents such a house deed proving that the property owner does in fact own the property, and a survey done to prove that there is sufficient space to accommodate you without overcrowding then you should be fine.