www.gov.uk/government/news/tier-1-investor-visa-route-closes-over-security-concerns
www.farrer.co.uk/news-and-insights/tier-1-investor-visa-closes-on-17-february-2022/
blog.macfarlanes.com/post/102hj1f/the-uk-government-closes-the-investor-visa-category
www.boodlehatfield.com/articles/scrapping-of-investor-visas-a-damaging-move-when-uk-economy-is-still-recovering-from-covid/
Update:
questions-statements.parliament.uk/written-statements/detail/2023-01-12/hcws492
assets.ey.com/content/dam/ey-sites/ey-com/en_gl/topics/tax/tax-alerts-pdf/ey-united-kingdom-government-provides-final-response-summarizing-review-findings-for-tier-1-investor-visa-route.pdf