Rishi Sunak has taken up senior part-time advisor roles at tech giant Microsoft and artificial intelligence start-up Anthropic. The former prime minister has been told he must not lobby ministers on behalf of the companies by the Advisory Committee on Business Appointments (Acoba), an independent watchdog which oversees the activities of former government figures. Sunak - who remains the MP for Richmond and Northallerton - will donate payments for the jobs to a charity he recently founded, the watchdog said. During his premiership, Sunak made tech regulation a significant priority, setting up an AI safety summit in 2023. In letters of advice sent to Sunak by Acoba and published on Thursday, his role at Microsoft was described as providing high-level strategic perspectives on geopolitical trends.