Impact to Starting Rate for Savings and Savings Interest Allowance Under New FIG Scheme

As per the subject, if a taxpayer chooses the new FIG scheme, he/she loses his Personal Allowance. What's unclear to me after reading all the documentation is the impact to the Starting Rate for Savings and Savings Interest Allowances assuming he/she also earns UK interest. Please kindly advise which of these scenarios are correct. I have read through all the applicable text and technical notes from HRMC but unfortunately cannot find the answers Starting Rate for Savings Scenario 1. The starting rate is still £5,000 and it will only be reduced if "other UK income" + "savings interest" is > £17,570. Same as NOT claiming FIG Scenario 2. The starting rate is still 5,000 but since there is no personal allowance of £12,570, every £1 "other UK income" will reduce the £5,000 by £1. Scenario 3. Starting Rate for Savings does NOT apply if you claim new FIG scheme Savings Interest Allowance, Scenario A. The allowance is £1,000, £500 or £0 depending on the tax payer total income (EXCLUDING all foreign income) Scenario B. The allowance is £1,000, £500 or £0 depending on the tax payer total income (INCLUDING all foreign income) Scenario C. There is no savings interest allowance if tax payer claims FIG scheme. Thanks

Hi,
We are unable to provide any further detail on how these changes will apply to an individual’s personal circumstances at this time.
Thank you.