Britain strengthened its travel advice for Iran on Tuesday, warning of a high risk of sudden escalation in the Middle East and extending its guidance to British nationals planning to travel through the region. In its updated advice, the UK Foreign Office described the situation as “deeply unpredictable” (previously “unpredictable”) and said the risk of sudden escalation was high, replacing earlier language about possible further attacks and unforeseen escalation. The advisory now specifically warns that Iran has declared its intention to target US- and Israel-linked organizations, businesses, facilities and institutions, a warning absent from the previous version. The revised guidance also refers to strikes and retaliatory attacks by “Iran and others” (previously only “Iran”) and traces the conflict to early 2026 (previously July 8). Britain also expanded its guidance to cover British nationals planning to travel through the Middle East, rather than only those already in the region.