Update will each time change savings account?

Cat500

Does your will need to be updated each time you change your savings account to get a better interest rate?

naedanger

No. Indeed it is usually a bad idea to identify accounts or even specific assets in your will. See the following thread for more details and consider getting your will professionally written.
https://forums.moneysavingexpert.com/discussion/6252553/assets-including-in-a-will#latest

TBagpuss

No. Don't identify separate accounts in th will itself, just set out the proportion of your assets you want each beneficiary to have.

It's sensible to keep a separate list of what accounts / other assets you have for your executors to refer to - maybe keep it with a copy of the will and either let your executors know where to find it or keep it somewhere obvious and clearly labelled so they can find it when thy start to deal with the estate.