at six: a close encounter between russia and the royal navy in the black sea off crimea. russia says it's fired shots and dropped bombs in the path of hms defender — a claim the ministry of defence has denied — but our correspondent on—board says the situation is tense. this russian coast guard vessel has come up right close to this british warship and is trying now to force it to change course. if you don't change the course, i will fire — if you don't change the course, i will fire. . . . if you don't change the course, i will fire. ,, ., , if you don't change the course, i willfire. ,, . , ., , , will fire. russia says the warship was violating _ will fire. russia says the warship was violating its _ will fire. russia says the warship was violating its waters, - will fire. russia says the warship was violating its waters, britain | was violating its waters, britain says they were sailing in international seas. we will be asking why this happened and how serious this encounter could be. also tonight.