RSU capital gains for un-remitted amount using Remittance basis

I work for a US Based company in the UK, and as part of my employment, I get some RSU as well. I Pay taxes on those initial value of those RSUs as if it was normal income here. Once the RSUs are vested, they are credited in my US Trading account, and when I sell them, the money stays in the US and is not remitted back to the UK. Last year I made some gains by selling some of these shares, the gains which are not remitted to the UK, and I am using the remittance basis for my self-assessment. Do I need to pay capital gains tax in the UK for the same? Thanks!

Hi,
You can see guidance here:
Capital Gains Tax: what you pay it on, rates and allowances
Thank you.