US Treasury Bond P/L Treatment & Calculation

Hi, just want to confirm: 1) if I bougt US T-Bill at US$98 and I wait until it matures and get back the face value US$100, this US$2 profit should be treated as "Income" (Deeply Discounted Security) instaed of Capital Gain when doing my UK Tax reporting? 2) if the US T-Bill carries an Interest (Coupon), this gain should be treated as "Interest" when doing my UK Tax reporting? Cheers,

Hi,
This forum is for general queries only and is intended to help you self-serve.
We are unable to provide specific advice tailored to individual circumstances. 
You may wish to contact our Self Assesment team:
Self Assessment: general enquiries 
Or consider seeking professional advice. 
Thank you.

Mine is a general query only. I am just asking HMRC's principle how you treat these, not requesting a specific advice for my own tax calculation. The scenario I gave is simply a hypothetical example for your easy understand my question. By the way, my interest earning is just few hundred pounds, not worth seeking expensive professional advice from tax consultant. Genuinely disappointed.