Today on <em>Ukraine: The Latest, </em>we discuss developments in the humanitarian grain corridor in the Black Sea, look at the alleged Russian spy-ring in the UK, and consider how Russia and Iran might be circumventing sanctions by using the Caspian Sea.

Every weekday The Telegraph's top journalists analyse the Russian invasion of Ukraine from all angles and tell you what you need to know{ai:summary}<p>Today on Ukraine: The Latest, we delve into the Black Sea's humanitarian grain corridor, unravel the alleged UK Russian spy-ring, and investigate Russia and Iran's possible sanctions evasion through the Caspian Sea. #foreignaffairs</p>

Ukraine: The Latest - Russia and Iran close to causing 'disorder in the global shipping community'

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