mark cancian, l thank you very much forjoining us. ukraine would not be able to continue. saturday marks 500 days since russia's invasion of ukraine and president volodymyr zelensky has visited snake island, where ukrainian soldiers famously defied a russian war ship at the beginning of the war, calling it a sliver of land in a wide sea, but proof — he says — that ukraine will win the war. here's some of the video that he released. translation: dear ukrainians, i wish you good health. - today, we are on snake island, on our snake island, which will never be conquered by the occupier, like the whole of ukraine — because we are a country of the brave. today, we honour here our ukrainian heroes, all the soldiers who fought for this island, who liberated it. and although this is a small piece of land in the middle of our black sea, it is a great proof that ukraine will regain every bit of its territory. i want to thank, from here, from this place of victory, each of our soldiers for these 500 days. here in the uk. a bbc presenter has been