Well nor I, Toadstool! Thanks to Air Pig we can see the "solemn and binding" undertaking that Russia, USA, and UK made with the Ukraine. We (ie the signatories) will not invade, blockade, or lay sanctions on Ukraine providing it keeps to the terms laid down. If there is any infringement of this agreement it is to be referred by the signatories to the UN Security Council. Can anyone spot the slight flaw (from Ukraine's p.o.v.) with this arrangement?
They were sold a pup, I'm afraid, and unless we (NATO, "the West", the USA, the EU?) enter into a real treaty with them, they are on their own and probably know that already.
Certain other Eastern European countries are more fortunate, sheltering under the protection of NATO membership. That is where push will come to shove. That is when the British ambassador will no doubt deliver that final note, with war following with the mid-day pips, if indeed Putin turns out to be "that stupid".