THIS may well be a blind accusation, but we suspect that there are certain elements out to sabotage St George's Day - which, for anyone shameless enough to admit they didn't know, is today - and spoil the occasion for the English. On the one day of the year when the English can walk tall in places like Queen's Road Central and Des Voeux Road looking as if they owned the place (okay, okay, so they usually do anyway, but that's beside the point), the Scots have planned a Celtic cavalcade through the central business district complete with kilt-clad guards of the Black Watch and the skirling bleat of the bagpipes. All this tartan stirring - with Jardine's chieftain Nigel Rich in the thick of it as guest of honour - is being held under the cover of a Scottish food promotion at Oliver's Delicatessen, but Keeping Posted knows better. What's worse is that Nigel Rich is an Englishman - in fact, so English, that it has even been whispered that he carries a tattoo of St George and the dragon on his person! In more enlightened times the Tower of London was a recommended stopping off pointfor such acts of treason. If that's not bad enough, one of this town's legendary Scotsmen - ex-soccer star Walter Gerrard - has decided to get in on the act by wearing a kilt and baring his ''elegant limbs'' for the cause of Scotland at Pomeroy's - a sight that is bound to put diners right off the cock-a-leekie. Tipped off by all this Machiavellian (at least he was Italian) goings-on, we sneaked into the gym at HMS Tamar, where members of Hongkong's St George's Society, marshalled by president Mike Rawlinson, were practising their traditional dance steps for theSt George's Day Ball tomorrow at the Hilton for which, incidentally, a few tickets are still available. But watching them as they deft-footed the Gay Lancer routine - though for politically correct reasons the ''gay'' bit has now officially been dropped - we were non-plussed to see Geoff McEnery, managing director of Hill Samuel, and his wife Phil doing a delightful twirl. But surely, isn't Geoff the president of the very Irish St Patrick's Society? And, would you believe, alongside him in similar pose was Welshman Rogery Clarke, president of the St David's Society. Evidently when banker Geoff arrived at HMS Tamar, we understand, the stern sergeant at the gate took some convincing that the gentleman with the Irish accent and a briefcase was seeking to go inside the army base to practice English folk dancing. No doubt, David Gairns, president of the St Andrew's Society, was hatching Anglo-Scottish plots elsewhere in town.