WORLD NOTES BRITAIN RANDY ANDY'S NEW TUNE

During his much publicized bachelorhood, Britain's Prince Andrew earned the nickname ''Randy Andy'' for squiring a variety of comely young women about town. The most famous of them was soft-porn Film Starlet Koo Stark. Now Andrew, 26, who is to wed Sarah Ferguson next month, is polishing his image. In a fund-raising speech before a group of London businessmen last week, Andrew decried loose morals. Said he: ''Moral pollution may well be a strong phrase to use, but I feel that it is justified, particularly when you look at the amount of gratuitous violence purveyed on television and in the name of entertainment.'' Andrew also excoriated drug and alcohol abuse. The message was royally received: the prince won a standing ovation.