This tweet appears to have come from Jim's account. At least @jimmurphymp is not a spook account so I'm hard up for an alternative explanation!
It allegedly appeared for a very short time, only to be disappeared quicker than a Chilean who was opposed to General Pinochet and Mrs Thatcher (wink wink, nod nod)! But not, of course, before some eagle-eyed follower captured it for posterity... and Munguin.
Now the way Munguin remembers it, it was Liechtenstein that bombed Pearl Harbour... or was it Pearl Harbour that bombed Liechtenstein... ? (I bet Danny is going to tell me it's "Pearl Harbor" and in any case that it was Monaco that did the bombing.)
Anyway, Jim's love of, and support for, weapons of mass destruction is quite clear here, even if he doesn't seem to know quite whom he'd use them on.
It's a very scary thought that he would ever be in charge of putting milk in the tea, never mind anything else.