Moving Address during Naturalization

Hi, I will be applying my naturalization application in December 2014, then after I have planned for long holiday to India as soon as my application is done through NCS.......some of the questions coming in my mind are:

1. Can i move my address from london to Birmingham, or there is any address requirement ? like person should be required to live upto certain months before applying.

2. I want to move my address for two reasons:
1. when i will be on holidays there would be sum1 whom I trust and can open the letters and let me know if any progress or when to come back for ceremony if the approval comes.
2. In london i live apartment, so why to pay the unnecessary Rent even when i will be on holidays. So better to shift my stuff to friend place.

3. which council i should be applying my application from london or the Birmingham one....or it doesn't matter?

So, can i move my address or do i have to wait at present address only for the naturalization process to complete.