Question about foreign interest

Is the foreign interest (e.g. interest from a foreign bank, etc.) treated as part of the saving (e.g. interest from a UK bank) and entitled for starting rate for savings and personal savings allowance when calculating income tax ?

Hi
Yes.  
Once converted to pounds sterling, if it is below £2000.00 and no tax has been deducted from it, it can be dedlared in box 3 of SA100 page TR3.  
If foreign tax has been deducted, the interest and tax deducted, will need to be shown in SA106 instead and you may be able to claim a foriegn tax credit relief.