Russia is attacking cargo ships and port infrastructure across the Black Sea coast in an attempt to make Ukraine’s grain exports collapse.

That attacks hurt the agriculture industry, which brings in much-needed money to keep Kyiv’s war effort going.

We spent a morning on patrol with the Ukrainian navy as they protected the giant cargo ships racing into port to load up with grain and get out fast, before any Russian drones arrived.

In a coastal patrol vessel recently donated by Estonia and under the wailing sirens denoting an imminent air attack, the crew took us through their different roles; each critical if the vital life line of the grain corridor is to remain open.