HMT has updated its advisory notice on high-risk third countries following the most recent Financial Action Task Force (FATF) plenary. Regulated businesses are required to apply enhanced customer due diligence and enhanced ongoing monitoring in any business relationships with a person established in a high-risk third country or in relation to any relevant transaction where either of the parties to the transaction is established in a high-risk third country.

https://www.gov.uk/government/publications/money-laundering-advisory-notice-high-risk-third-countries–2/hm-treasury-advisory-notice-high-risk-third-countries