Nigel Short has left Twitter. His account @Nigel Short does not exist anymore. I have no idea wether it is a reaction to Musk's ongoing misbehaviour or his own controversial habitus. He used to post photos from the early stage of his career quite frequently. Good luck the Internet Archive @internetarchive has many snapshots of his profile: https://web.archive.org/web/20230527074213/https://twitter.com/nigelshortchess (probably I did most of them myself).