The latest game being played by Putin and Ukraine involves a further escalation in tension over the Kerch Strait. This is the only navigable extrance into the Sea of Azov which, since the annexation of Crimea, now has Russian territory on both sides. The Sea of Azov has the important port (for Ukraine) of Mariupol and there is a Russian built bridge across the Strait. The navigable channel goes under the bridge only a mile or so from the coast of Crimea. By agreement, military vessels are not permitted access so the Ukraine should not have such ships (two gunboats, with light armaments, and a tug) entering, but they had informed Russia in advance. A couple of weeks before the Russians had blockaded the channel under the bridge and, in any case, claim a 12 mile territorial ownership of the waters around their territory which would clearly include the navigable entrance to the Sea of Azov. It seems there is escalation and provocation on both sides which could easily get out of hand, especially as NATO are likely to get involved. It is important to note that the Russian annexation of Crimea is not recognised by NATO countries so neither is the declaration of the 12 mile territorial waters.
It is surprising that these events have not been widely discussed. It is probable that, at least in the UK, everything is drowned out by news about Brexit negotiations.