A version of a journal article or conference paper, whether in its final published form or as a self-archived accepted manuscript, must be openly accessible under a Creative Commons Attribution (CC BY) licence. In the UK, the Open Government Licence (OGL) provides equivalent reuse rights to a CC BY licence.
If your article acknowledges funding, make sure your selected licence aligns with their open access policy. Typically, a more restrictive licence (like CC BY-NC) needs prior approval.
If you aim to reach a global audience, note that a licence with the Non-Derivative (ND) restriction blocks unauthorised translations.