This BBC news item includes statistical info on UK non-doms, which @Millian might find useful:
https://www.bbc.com/news/business-32216346
Any further changes to UK non-dom status beyond those introduced last April will presumably be announced by the Chancellor in next October's Autumn Statement and come into force from the next UK tax year starting on 6 April 2026 at the earliest. In much the same way as any easing of the foreign remittances taxation requirement locally wll presumably come into force from the next Thai tax year starting on 1 January 2026 at the earliest - subject, of course, to all necessary legislative hurdles being surmounted in the meantime. That said, though, we should not forget that this is Thailand! 🤔