Indian NRE interest income tax

I have been living in the UK for over 10 years. I have a NRE account in India in which I always had interest income less than £2000. As I claimed by domicile to be outside the UK under Residence, remittance basis etc form, my income was not taxable. Now I’m expecting my interest income to go over £2000 for the first time. I have following questions- 1. As I’ll be claiming my domicile outside the UK, would the tax payable be on any amount over £2000 or the whole of interest income? 2. I haven’t claimed tax spare relief of 15% in any of the years before as interest income was below £2000. Can I claim now the 15% relief and if so would my 10 years countdown start from the first year the relief will be claimed?

Hi,
 

Please refer to guidance at: Paying tax on the remittance basis (Self Assessment helpsheet HS264)   .

Thank you.