Question Author
...sorry folks have been gardening since I posed the question, had to finish it ready for a big day tomorrow, then had to grocery shop on way home- had worked out it must be twist and shout but could not see why, even when the chap who set the question told me - he had to speak against a roar of other chaps, then on way home realised the significance of number - song, of course, what a clever clue. I did not have any letters, of course. Many thanks to you all and well done you solvers.....