Interests communicated to HMRC?

Hi all,

I am trying to figure out if Chase sends the interest balance to the HMRC for taxes purposes or I do have to fill my self assessment. According to the HMRC website I only need to do it if my income from savings and investments is above 10k, which is not the case, but it also says I need to pay taxes on it because the allowance is only £500.

What am I missing here?

Thank you!