Chancellor Friedrich Merz and UK Prime Minister Andy Burnham exchanged the instruments of ratification for the Kensington Treaty in Berlin on 8 October 2026, formally bringing the wide-ranging bilateral accord into force. While the 2025 treaty covers defence, tech and climate, Thursday’s joint statement devoted special attention to mobility chapters that many multinationals have been waiting for. Key provisions now activated include: • a 90-day visa-free Business Mobility Arrangement allowing German and UK employees to undertake short-term client work across the Channel without a work permit; • mutual recognition of professional qualifications in engineering, auditing and nursing; • expedited fast-track lanes at Frankfurt, Munich, Heathrow and Manchester airports for registered frequent business travellers; and • a commitment to negotiate a reciprocal youth mobility/working-holiday quota of 5,000 places per year by mid-2027. The two leaders also announced an “Industrial Tech Corridor” that will host quarterly CEO round-tables to link AI scale-ups with advanced-manufacturing clusters in Hamburg, Munich, Birmingham and Leeds. Immigration desks in both countries will pilot a shared digital portal so that corridor participants can file visa, A1 social-security and customs documentation in one place. For German employers the biggest win is the automatic service-supplier route, which removes the need for UK staff to obtain the cumbersome § 19c ICT permit for stays under three months. Conversely, German nationals undertaking after-sales work in the UK can now rely on a codified exemption from the 2024 Immigration Rules Appendix V Visitor restrictions. Tax and social-security coordination is still pending; companies should continue to obtain A1 certificates until the mooted European Social Security Pass becomes operational. With bilateral trade already rebounding to €134 billion in 2025, mobility experts expect the treaty to reduce lead times for project deployments in automotive, pharma and green-tech supply chains. HR teams should consult the not-yet-published implementation guidelines—due by 1 December 2026—and update their travel-policy matrices accordingly.
