electoral

hi i am currently thinking of obtaining a mortgage and have seen a house i am interested in my issue is that my bank account and the house i will use for credit checks is my partners house as i have a known and good credit rating at that adress
whilst i am on the electoral register in my fathers house which is also in another county
i dare not switch my bank details to this address as they have had persistent money problems in the past
so i guess my question is should my bank details etc be at the same adress as im registered to vote ,im assuming the answer is yes but would like some clarification
many thanks