I am intending to submit a paper to the Oxford University Commonwealth Law Journal and I am referring to data from my thesis. I understand I can deposit it in a repository. Please advise how to do it.
Sure thing. Super easy. Sign up here for free: https://figshare.com/account/register , upload your files and add metadata, publish! Then when published, you can navigate to the public page to get your DOI. If your use case is more complex than this, there are other ways we can help but let's start here