VARIOUS well-known people have been given an opportunity of moulding the ideal programme, an almost hopeless task when one remembers the varied tastes of the myriads of listeners. Tonight those wirelass favourites, the ' Roosters,' are going a step further and taking a genial backward look. What, for instance, would please Henry VIII if that rotund monarch could listen today ? Would Ethelred the Unready care for anything at all ? How about Alfred the Great and Sir Francis Drake ? How often would Cromwell have asked for jazz T These and many other interesting speculations will form the subject of the ' Roosters' broadcast tonight and on Thursday.